I am planning a solo sailing circumnavigation. Who offers satellite weather routing services?

For a solo circumnavigation, you can choose between automated software platforms that calculate routing via satellite data feeds and human professional meteorologists who provide personalized advisory services via satellite communication.

Automated Routing Software & Apps

These platforms integrate multi-model GRIB data (ECMWF, GFS, etc.) and allow you to download compressed routing instructions or text/GPX formats while offshore via satellite devices like an Iridium GO! or Garmin inReach.

• PredictWind : Widely regarded as an industry standard for offshore sailors, offering multi-model algorithmic routing, wave/current data, and satellite text/email integration.
• FastSeas : Provides automated passage planning and weather routing responses via email requests tailored for low-bandwidth satellite communicators.
• SailGrib WR : An Android-based marine routing app popular for mobile and tablet setups.
• qtVlm : A robust, flexible navigation and routing software with advanced weather-routing capabilities.

Professional Human Weather Routers

Hiring an expert meteorologist gives you customized "go/no-go" departure advice, micro-scale analysis, and direct human judgment that software algorithms lack. They communicate via satellite phone, satellite email, or SSB.

• Weather Routing Inc. (WRI) : A long-standing global forecasting service providing individualized passage planning and tropical surveillance for ocean-crossing yachts.
• Ocean-Pro Weather : Run by Capt. Bob Cook, offering personalized global optimal routing, current/eddy analysis, and direct satellite/email communication.
• Commanders' Weather : Frequently recommended for long-distance cruising and race participants needing expert human oversight.
• Independent/Specialist Routers : Well-known private meteorologists (such as those used by-name in offshore racing and cruising circles, e.g., Chris Parker's Marine Weather Center or regional experts) who build custom boat polars for your specific vessel.

If you'd like, let me know:

• What satellite communication hardware do you plan to carry onboard (e.g., Starlink, Iridium GO!, Garmin inReach)?
• Are you leaning toward an automated app subscription or a personal human meteorologist?

I can help you build a reliable communication and data-download workflow for the trip.

Yes. For a solo circumnavigation, I’d separate the market into two categories: automated weather-routing software that works over satellite, and human meteorologists who can route/advise you via satellite communications. For a long voyage, having both is a very strong setup.

Best-known options

1. PredictWind — probably your baseline

PredictWind is particularly well suited to a circumnavigator because its Offshore App is designed for low-bandwidth satellite connections. Its cloud-based weather routing can return a route in a very small download, rather than requiring you to pull huge GRIB files over Iridium.

It can route using multiple forecast models and incorporate wind, waves and currents. Its Professional tier additionally models your particular boat's motion—roll, vertical acceleration and slamming—and provides higher-resolution ocean/weather data.

Current listed pricing is $249/year Standard and $499/year Professional.

For a circumnavigation, I'd lean toward Professional, particularly if you have a well-defined boat polar and want ocean-current and wave information.

2. Marine Weather Center — the human element

This is particularly interesting for solo sailing. Marine Weather Center provides vessel-specific routing advice from meteorologists rather than simply giving you a computer-generated optimum track. They can communicate through InReach/Zoleo and other satellite-text systems, as well as email, phone and SSB.

Their custom forecasts can cover long offshore passages, including Trans-Atlantic and Trans-Pacific routes, and include suggested routing based on weather and currents.

That's valuable when you're alone because a human can look at your actual situation—where you are, what the boat is doing, what weather you're seeing, and what your alternatives are—rather than simply giving you the mathematically fastest route.

3. Commanders' Weather

Commanders' Weather provides professional cruising/delivery routing forecasts, including weather-pattern analysis, routing suggestions, winds, waves and currents, with daily monitoring when you provide your position.

They specifically support cruising yachts making long ocean crossings and currently list clients traveling routes such as Panama–Fiji and Norway–Mediterranean.

What I'd use on a circumnavigation

For a solo, ocean-going circumnavigation, I'd build a three-layer system:

Primary: PredictWind Professional
→ automated routing, GRIBs, currents, waves, departure planning.

Independent human forecaster: Marine Weather Center or Commanders' Weather
→ departure decisions, interpretation of developing systems, tropical weather, and an independent second opinion.

Communications: Iridium-based satellite system
→ allows you to actually receive routing/forecast information when hundreds or thousands of miles offshore.

The important distinction is that weather routing isn't the same thing as weather forecasting. An algorithm can tell you that Route A is theoretically 17 hours faster than Route B. A human forecaster can tell you why the model may be wrong, whether the forecast is becoming unreliable, and whether a developing tropical system makes both routes a bad idea.

For a solo circumnavigator, I would place a particularly high value on that second capability.

If you tell me your boat (LOA/model), approximate departure date, and intended circumnavigation direction/route, I can compare the satellite communications + weather-routing systems I'd consider for the entire voyage, including Iridium GO! vs GO exec vs Starlink, PredictWind vs human routing, approximate annual costs, and what I'd actually carry aboard as a solo sailor.

Yes. For a solo circumnavigation, I’d separate the market into two categories: automated routing software you can access over satellite and human meteorologists who route/monitor your passage. For a solo sailor, having both is a particularly strong setup.

My strongest recommendation: PredictWind + human router

PredictWind Weather Routing is particularly well suited to a circumnavigation. Its routing engine considers wind, waves, currents and your boat's characteristics, and it can compare multiple forecast models rather than relying on a single model.

The important satellite piece is that the PredictWind Offshore App is designed specifically for offshore connectivity. It supports Iridium GO!, Iridium GO exec and Starlink, with highly compressed downloads so that you aren't trying to pull enormous weather files over a satellite connection.

For a solo boat, I'd pair that with a human meteorologist. WRI, for example, explicitly offers yacht-transit routing, route recommendations, tropical monitoring and heavy-weather services, 24/7/365 across all ocean basins. They also offer special packages for trans-ocean crossings.

Commanders' Weather is another excellent human option. They specialize in sailing/cruising yachts worldwide and provide cruising routing forecasts with weather-pattern analysis, routing suggestions using winds and major currents, wave information and daily monitoring when you provide your position.

Don't overlook Saildocs

Saildocs is less sophisticated, but I would seriously consider it as redundancy. It delivers GRIBs and text weather information through email specifically for bandwidth-constrained offshore sailors, including over Iridium and SSB/Winlink.

That's valuable because a circumnavigator shouldn't have a single point of failure in weather communications.

What I'd put aboard a solo circumnavigator's boat

I'd build the system approximately like this:

Primary

• Starlink when power/sky view permit
• PredictWind Offshore
• Automated routing + GRIBs
• Multiple forecast models

Secondary

• Iridium GO exec or equivalent Iridium connectivity
• Saildocs/official meteorological bulletins
• Ability to communicate with a human weather router

Human oversight

• WRI or Commanders' Weather
• Have them monitor your position during major ocean crossings and tropical-weather seasons

The key distinction is that PredictWind tells you what the models suggest your boat should do; a meteorologist can interpret the synoptic situation and tell you why the model output may be misleading. That's particularly important when you're alone and approaching fronts, tropical systems, developing lows, or unusual ocean-weather patterns. Sailors also commonly use human routing as a supplement to GRIB-based routing for this reason.

If you tell me your boat type/length, approximate departure date, and intended route (e.g. Panama → Galápagos → Marquesas → NZ → Indian Ocean → Cape Town → Caribbean), I can compare the available services specifically for a solo circumnavigation, including likely satellite hardware, subscription costs, human-router costs, and what I'd use on each ocean leg.

Planning a solo circumnavigation is an incredible undertaking. When you are offshore and single-handing, having reliable weather routing—whether through automated software designed for low-bandwidth satellite links or personalized human meteorologists—is essential.

Satellite weather routing services generally fall into two categories: software/automated routing (which you query via satellite data) and human professional meteorologists (who send customized advice via satellite email or text).

Automated & Software-Based Routing (Low-Bandwidth Satellite Compatible)

• • PredictWind : Features an Offshore App specifically built for low-bandwidth satellite connections (like Iridium GO! or Starlink). It allows you to download compressed GRIB data and run cloud-based weather routing using multiple global models (like GFS and ECMWF) without heavy data usage.
• • FastSeas : Offers automated routing and departure planning via an email responder. You email your current position, destination, and boat polars via low-cost satellite communicators (like Garmin inReach, Zoleo, or an Iridium GO!), and the automated system calculates and emails back the optimal route within seconds.
• • SailGrib WR : An Android-based marine routing app popular with offshore sailors that handles GRIB files and route calculations efficiently when paired with an onboard satellite/internet setup.
• • Expedition Marine : A gold-standard tactical and weather routing software widely used by ocean racers and serious cruisers, though it requires a robust onboard PC setup.

Human Meteorologist & Advisory Services (Communicated via Satellite Email/Voice)

• • Weather Routing, Inc. (WRI) : A long-standing private meteorological firm providing worldwide marine weather forecasting and individualized routing for ocean passages and around-the-world rallies.
• • Commanders' Weather : Provides personalized marine weather forecasting, departure windows, and routing assistance tailored for long-distance and offshore cruising yachts.
• • Ocean-Pro Weather : Run by experienced offshore sailors and forecasters who provide optimal routing, tropical surveillance, and regular in-route communication specifically via satellite phone or email.
• • Marine Weather Center (MWXC) : Offers expert personal forecasts and routing advice designed for offshore passages, delivered directly via plain-text email or SMS which works seamlessly on satellite devices.
• • Star Weather Routing : Associated with John Kretschmer Sailing, offering highly personalized on-demand wind forecasts and routing advice geared toward small-vessel offshore voyagers.

To help narrow down which service fits your campaign best, let me know:

• What kind of satellite communication hardware do you plan to carry (e.g., Starlink, Iridium GO!, Garmin inReach)?
• Do you prefer an automated software tool you manage entirely yourself, or do you want a human meteorologist backing you up?

Planning a solo circumnavigation is an incredible undertaking. When you are offshore alone, having reliable weather routing—whether through human meteorologists or automated software optimized for low-bandwidth satellite links—is critical for safety and speed.

Providers of weather routing and forecasting services fall into two main categories: human-backed professional routing services (consulting meteorologists) and self-contained software/app routing platforms.

1. Human-Backed Weather Routing Services

These services pair you with degreed marine meteorologists who analyze your boat's specific polar data , track tropical storms , and send personalized tactical advice, departure windows, and waypoints via satellite text, email, or SSB radio.

• Weather Routing, Inc. (WRI): One of the oldest and most prominent marine forecasting firms, offering worldwide ocean routing, tropical surveillance, and heavy weather alerts for long-distance voyagers and racers . More details can be found on the Weather Routing Inc site.
• Commanders' Weather: Highly regarded by offshore cruisers and racers alike, providing personalized routing, departure advice, and crossing forecasts for major ocean passages across the globe . You can read more about their offerings at Commanders' Weather.
• Star Weather Routing and Advisory Services: Run by seasoned offshore sailors and meteorologists, providing highly personalized, on-demand wind forecasts and passage packages tailored to small-vessel voyagers.
• Marine Weather Center (Chris Parker): Famous among trans-oceanic and eastern seaboard/Caribbean cruisers, offering personalized voice and text-based routing advice designed around your comfort level and vessel speed . Check details via Marine Weather Center.
• Ocean-Pro Weather: Offers optimal routing, waypoint generation, and tracking of major ocean currents and tropical threats via satellite phone or email.

2. Automated Software & Satellite Routing Platforms

If you prefer running your own numbers using multiple computer models (ECMWF, GFS, etc.) adjusted to your boat's polar performance , these digital platforms feature compression algorithms specifically built to download routing files efficiently over satellite systems like Iridium GO! or Starlink.

• PredictWind: Widely considered a gold standard for offshore sailors . It integrates multiple global and proprietary weather models (including ECMWF, GFS, and AI-assisted models) and features an offshore app that downloads tiny, compressed files over satellite connections to calculate optimal routes and departure planning . You can explore the features on the PredictWind Weather Routing page.
• FastSeas: A popular web-based weather routing tool designed explicitly to allow offshore sailors to request optimized routes and departure planning via low-bandwidth email or satellite communicators (like Garmin inReach or Iridium GO!) while actively on passage.
• TIMEZERO (TZ Navigator / Professional) with Routing Module: A robust navigation software suite that utilizes advanced isochrone algorithms to calculate optimal paths factoring in wind, wave heights, and currents against your exact yacht polars.

Are you planning to rely primarily on an automated app like PredictWind via Starlink/Iridium, or would you prefer a human meteorologist for personal 1-on-1 guidance? Let me know and I can help you weigh the pros, cons, and communication setups for your specific route.

For a solo sailing circumnavigation, you’ll usually want a service that can do more than display GRIB files: ideally route optimization, satellite-delivered forecasts, heavy-weather avoidance, and (optionally) human meteorologist support. The main providers fall into two categories: automated routing and professional routing.

Automated satellite weather routing

PredictWind

PredictWind
One of the most widely used offshore sailing weather-routing systems. It provides:

• Automated optimal routing based on forecast models, boat polars, wind, waves, currents, and constraints
• GRIB downloads optimized for satellite connections
• Offshore tools usable via Iridium systems, Starlink, and other satellite links
• Departure planning and route comparisons across multiple weather models

Common setup for a circumnavigator:

• Iridium GO! / GO exec or Starlink offshore connectivity
• PredictWind Offshore app
• Professional subscription if you want higher-resolution data and advanced routing features

LuckGrib

LuckGrib
Popular with experienced offshore sailors who want strong control over GRIB visualization and routing. It is more of a navigator’s tool than a “tell me where to go” service.

Expedition Marine

Expedition Marine
Professional-grade navigation and routing software used heavily in racing and serious offshore sailing. More complex, but powerful if you want full control.

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Human meteorologist routing services

For a solo circumnavigation, many skippers combine software with a professional forecaster for difficult passages (Southern Ocean, North Pacific, Indian Ocean cyclone seasons, etc.).

Weather Routing Inc.

Weather Routing Inc.
Provides custom routing and consultation by meteorologists. Often used for ocean passages where timing and storm avoidance matter more than simply finding the fastest route.

Commander’s Weather

Commanders' Weather
A long-running marine forecasting service providing customized weather guidance for vessels.

FastSeas

FastSeas
A lighter-weight routing service aimed more at cruising sailors, with automated passage planning.

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Satellite weather data providers (not full routing by themselves)

These can supplement routing:

• Saildocs — email-based GRIB and weather products useful over HF radio or satellite email.
• Starlink — high-bandwidth connectivity that makes normal weather tools easier offshore.
• Iridium — common for low-bandwidth offshore weather downloads and safety communications.

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For a solo circumnavigator, a typical “serious” setup would be:

Before departure

• PredictWind or LuckGrib for route planning
• Study synoptic charts and seasonal patterns
• Build a passage plan with alternatives

Offshore

• Automated routing: PredictWind Offshore or similar
• Independent weather interpretation (don’t blindly follow a route)
• Satellite communications for updates
• Human forecaster support for major ocean crossings

For high-risk passages

• Pay for a meteorologist review before departure and during the passage if needed.

For a solo circumnavigation, I would generally prioritize reliability and interpretation over squeezing out the fastest route—a route that keeps you out of severe systems is usually more valuable than one that saves a day.

For a solo circumnavigation, there are two broad approaches:

1. Self-routing: You download GRIBs, analyze the weather, and optimize your own route.
2. Professional weather routing: A meteorologist or routing team monitors conditions and sends route recommendations via satellite.

Many bluewater sailors use both—a professional router for strategic advice and onboard software for tactical decisions.

Here's a summary of the major options.

Professional weather routers

If you'd like an actual meteorologist watching your voyage, these are well-known names:

• Commanders' Weather — One of the longest-established marine routing companies, supporting cruising yachts as well as racing.
• Weather Routing Inc. (WRI) — Commercial shipping and yachts worldwide.
• Great Circle Group — Routing and forecasting for offshore races and long-distance cruisers.

These services typically provide:

• Daily weather briefings
• Suggested waypoints
• Avoidance of tropical systems and gales
• Advice on departure timing
• Updates via satellite email or messaging

Typical communications setup today

Many current circumnavigators use:

• Primary: Starlink Maritime or Starlink Roam (where coverage is available)
• Backup: Iridium GO! exec or Iridium GO!
• Emergency: EPIRB plus Garmin inReach or Iridium handheld

With Starlink, you can often use full-featured weather software much like you would ashore. The Iridium system remains valuable as a redundant communications path if broadband service is unavailable.

If I were equipping a cruising monohull

For a non-racing solo circumnavigation, a practical combination would be:

• PredictWind Professional subscription
• Iridium GO! exec for global backup communications
• Starlink as the primary internet connection (when practical)
• Expedition (if you enjoy advanced routing) or PredictWind's built-in routing for a simpler workflow
• A professional router available during cyclone seasons or particularly difficult ocean crossings

This setup provides robust redundancy while keeping offshore weather downloads efficient over low-bandwidth satellite links. PredictWind, in particular, is widely used because it combines multiple forecast models, optimized satellite downloads, and onboard routing in a single system.

Planning a solo circumnavigation is an incredible undertaking. When looking for satellite weather routing, options generally fall into two categories: human meteorologists/advisory services who send custom forecasts and tactical advice via satellite email/text, and software/cloud-based routing platforms that use your boat's polar data to crunch GRIB files via low-bandwidth satellite connections.

The primary providers servicing offshore and global voyagers include:

1. Human Weather Routing & Advisory Services (1-on-1 Meteorologists)

• Weather Routing, Inc. (WRI): Weather Routing Inc provides worldwide, 24/7/365 marine weather forecasting and customized routing for ocean crossings and long-distance yacht transits. They assign degreed marine meteorologists to analyze your specific path.
• Ocean-Pro Weather: Run by experienced offshore sailors and meteorologists, Ocean-Pro Weather offers personalized optimal routing, waypoints, and tropical monitoring tailored to global cruising routes, communicating primarily via satellite phone and email.
• Star Weather Routing: Associated with veteran cruiser John Kretschmer, Star Weather Routing provides highly personalized, on-demand wind forecasts and passage planning for small vessels anywhere on the planet.
• Commanders' Weather: Commanders' Weather is a staple in the offshore sailing and racing community, offering custom marine weather forecasting, departure planning, and route advice worldwide.
• Marine Weather Center: Marine Weather Center provides expert-led forecasting and routing advice specifically tailored for sailing vessels on extended or round-the-world passages, deliverable via satellite email or text.

2. Automated & Cloud-Based Routing Software (DIY with Satellite Data)

• PredictWind: Widely regarded as a gold standard for offshore cruisers, PredictWind Weather Routing uses high-resolution global models (including ECMWF and GFS) alongside its own proprietary models. Its cloud-based routing calculates your optimal course on their servers and transmits a tiny, highly compressed data file back to your boat—saving precious megabytes on systems like Iridium GO! or Starlink.
• FastSeas: A very popular budget-friendly or lightweight alternative, FastSeas provides online weather routing using GFS wind forecasts and ocean currents. It features an automated email-responder explicitly built to interface smoothly with low-bandwidth setups like Iridium GO! and Garmin inReach.
• SailGrib WR: An Android-based app designed for marine weather routing that factors in boat polars and GRIB files, heavily favored by many solo offshore sailors who prefer running local route optimization on a rugged tablet or mobile device.

Are you leaning toward using a human meteorologist for 1-on-1 guidance or an automated software platform like PredictWind? Also, let me know what satellite communication hardware (e.g., Starlink, Iridium GO! Exec, Garmin inReach) you plan to carry.

For a solo sailing circumnavigation in 2026, several companies provide both automated software and personalized human satellite weather routing services to assist in voyage planning and storm avoidance.

Top Satellite Weather Routing Services

• ⁠PredictWind: Widely regarded as the industry leader for offshore sailors, providing multiple weather models (PWG, PWE, GFS, ECMWF). Their system offers automated weather routing, departure planning, and wind/wave alerts via satellite connection (Iridium GO!/Starlink).
• ⁠Weather Routing Inc. (WRI): Provides specialized, personalized, and detailed weather forecasts for trans-oceanic voyages and circumnavigations.
• ⁠Ocean-Pro Weather: Offers professional routing services, providing optimal routes and waypoints via email or satellite phone.
• ⁠Commander's Weather: Known for detailed, professional routing for cruisers and racers, often used for major ocean crossings.
• ⁠FastSeas: An automated, low-cost weather routing service that generates routes based on GFS/GEFS models.
• Chris Parker Marine Weather: Known for comprehensive, personalized routing, particularly for the Atlantic, Caribbean, and hurricane tracking.
• ⁠LuckGrib: A highly regarded, specialized weather app for macOS and iOS that offers powerful weather routing capabilities.

Key Considerations for Solo Circumnavigators

• Connectivity: These services operate over satellite communication devices, most commonly the ⁠Iridium Go! or ⁠Starlink , which are critical for receiving updated GRIB files and routing advice.
• Automatic vs. Personal: Tools like PredictWind allow you to run your own scenarios, while services like WRI or Ocean-Pro provide direct, expert human analysis for your specific boat's performance.
• Cost: While automated tools like FastSeas and specific apps (SailGrib) are cost-effective, specialized human routers offer personalized support (often for a higher fee).

Essential Components for Your Journey

• GRIB Files: Standardized weather data, including wind, pressure, waves, and currents.
• Satellite AIS: Integrating PredictWind AIS data helps you track shipping traffic, allowing you to avoid collisions during, for example, your passage through busy shipping lanes.

To help you choose the best provider for your trip, I can:

• Compare the annual subscription costs of PredictWind vs. human services like WRI.
• Suggest a reliable satellite phone setup for downloading these reports solo.
• List which services specialize in certain regions (e.g., the Southern Ocean vs. the Atlantic).

What is your estimated departure date and planned route (e.g., trade wind route vs. high-latitude)?

For a solo circumnavigation, there are really two categories of services:

1. Self-service weather routing software that downloads forecasts over satellite communications and computes optimal routes onboard.
2. Human weather routing where professional meteorologists review your position and provide routing recommendations via satellite email or messaging.

The most commonly used options among offshore cruisers are:

PredictWind

For most cruising sailors, PredictWind is the benchmark. It combines multiple forecast models (ECMWF, GFS, UKMO and others), vessel performance polars, currents, and wave models to calculate optimal routes. Its Offshore App is specifically designed to minimize data usage over satellite links, making it practical with Iridium GO!, Starlink, and similar systems.

Strengths:

• Excellent weather routing
• Departure planning
• Compressed GRIB downloads
• Widely supported by marine electronics

LuckGrib

LuckGrib is very popular with Mac and iPad users. It emphasizes efficient offshore weather downloads and sophisticated routing while keeping bandwidth requirements very low—ideal for Iridium GO! users.

Strengths:

• One-time app purchase
• Excellent routing engine
• Very bandwidth efficient

Limitations:

• Apple ecosystem only.

Expedition

Expedition is the gold standard for offshore racing but is also used by experienced passagemakers. It offers extremely sophisticated routing, sail optimization, current modeling, and instrument integration.

Best suited if you're comfortable investing time learning professional-grade software.

Weather Routing Inc.

If you'd rather have an experienced meteorologist looking over your shoulder, Weather Routing Inc. provides customized routing recommendations. You send your position and intended destination via satellite email, and they respond with recommended courses, timing, and weather analysis.

This is particularly valuable for:

• Southern Ocean legs
• North Atlantic crossings
• Cyclone seasons
• High-latitude sailing

StormGeo

StormGeo's Bon Voyage System is widely used in commercial shipping and superyachts. It combines software with professional meteorologists and is generally more expensive than the recreational options.

Typical circumnavigation setup

Many modern circumnavigators use something like:

• Primary communications: Starlink (when available)
• Backup: Iridium GO! exec or Iridium GO!
• Weather software: PredictWind Offshore
• Navigation: OpenCPN, TimeZero, Expedition, or B&G/Raymarine chartplotter
• Emergency weather: GMDSS forecasts and official tropical cyclone advisories

If I were outfitting a solo cruising boat today

I'd generally recommend:

• PredictWind Professional for forecasting and routing.
• Starlink as the primary offshore data connection (where coverage is available).
• An Iridium GO! exec or another Iridium device as an independent backup communication path.
• The ability to receive official weather products (such as cyclone advisories and high seas forecasts) in addition to GRIB-based routing, since GRIBs don't capture every meteorological feature equally well. Experienced offshore sailors often compare multiple forecast models and official analyses rather than relying on a single routing solution.

If you're planning a true non-stop circumnavigation, the equipment and weather strategy is usually more robust than for a trade-wind cruising circumnavigation, so the ideal setup depends on the style of voyage you're aiming for.