There are many ways to monitor and forecast weather online, and the choices can be overwhelming. Whether you’re a sailor who enjoys digging into meteorology or you prefer simple apps with clear colors and arrows, the best approach is to tailor your devices so they give you exactly the information you need quickly and reliably.
Most recreational boaters rely on a laptop, tablet or smartphone and use Wi‑Fi or cellular broadband to access forecasts. Ideally you’ll use Wi‑Fi to plan before departure, and once you’re underway you’ll often still have cellular access coastwise to reach weather apps and forecasting sites.
Free apps are a good starting point: they provide basic forecasts, radar and model output that reflect observed data or modeled atmospheric conditions. Remember, however, that free services can be limited. Paid or premium apps usually remove ads and add features such as higher-resolution models, more frequent updates and customizable notifications.
Check an app’s “About” or data sources section to understand where its information comes from. Try to use services that reference nearby reporting stations—data from a station 100 miles inland or heavily affected by local topography won’t match conditions off your coast. Many free apps draw from airports, weather balloons, buoys and volunteer personal weather stations, so knowing the source helps you interpret the forecast.
Customize app settings to match your preferences: choose units, map layers and visualization styles that make sense for you. Some skippers prefer colorful graphics and arrows; others want numerical readouts and charts. Once you settle on a favorite app and fine‑tune its display, you’ll find the data you need faster and with less effort. For small screens, interpretive clarity matters—smartphones are great for portability, but for in‑depth analysis I prefer an iPad or laptop.
Most mariners use a suite of apps, toggling between radar, satellite and thunderstorm products. Popular radar apps among boaters include Storm Radar, The Weather Channel and Dark Sky, which all offer short‑term forecasting features in their free tiers. Other frequently used apps include WeatherBug, Weather Underground and Storm Tracker.
Wind-specific apps provide more detailed marine information. Windfinder lets you save favorite locations, shows tides, sunrise/sunset times, barometric pressure and wind direction/speed, and it moves smoothly between past, present and forecast data. PredictWind and SailFlow are highly regarded for route guidance and forecasting, while Windy is popular for its map overlays and model options. For GRIB users, PocketGrib remains a favorite: downloading GRIB files gives you wind and wave fields on a custom map, which is invaluable when matching model projections to your intended course.
Professionals—delivery captains, commercial fishermen and long‑distance cruisers—often consult NOAA charts and textual analyses to form a larger picture. NOAA delivers an immense amount of data; it can be hard to navigate at first, but saving customized pages as bookmarks or home‑screen shortcuts simplifies repeated use and keeps frequently consulted products a tap away.
Anglers and charter operators have distinct needs and often use specialized resources. Sites that combine text forecasts, weather fax charts, satellite imagery, tides, currents, buoy reports and live radar are especially useful because they let users save locales and preferences. Being able to define multiple reporting zones and embed AIS or traffic overlays in your workflow is a practical advantage when planning a day on the water.
If you’re not tech‑savvy, ask a younger crew member for help saving sites to your home screen or creating bookmarks. The initial setup time pays off: the better organized your apps and pages are, the faster you’ll access the right information when you need it.
On my tablet I keep a compact system: a few trusted apps, plus bookmarked pages for NWS text forecasts, buoy observations, the National Hurricane Center and detailed local forecasts for my home port. Most experienced sailors assemble a similar toolkit tailored to their region and habits.
Stay vigilant when relying on smart devices. Forecasts and data feeds are powerful, but not infallible—if fast‑developing weather hasn’t been transmitted yet, your screen won’t show it. I once supported a charter captain who monitored several apps and believed we had avoided a line of squalls. When precipitation radars briefly showed clear skies, guests started boarding. I stepped away for a few minutes, then got an urgent call: a new red‑and‑yellow radar return was building almost overhead.
With the harbor horizon blocked by trees, I drove to the windward side of the island and watched a slanted line squall approach, whitecaps boiling up and lightning flashing. I called the captain: “Get everyone off the boat now.” We made it to shelter just before hail and a sudden wind wall hit. Guests later praised the captain’s quick response; she simply smiled and shrugged, “Sometimes you have to trust your own personal radar.”
Weather apps are convenient and powerful, but don’t worship technology blindly. Forecasts are predictions—well‑informed estimates, not guarantees. Use VHF reports, listen to other mariners, and observe local conditions yourself. Often you’ll be the first to notice a hyper‑local change that hasn’t yet been reported.
This article was originally published in the October 2020 issue.