SailFlow vs SailWindow

Whether you’re racing, cruising, day sailing, you need precise sailing forecasts and real-time wind. SailFlow delivers both. Powered by 90,000+ exclusive Tempest Weather Stations and 150,000+ total sources, SailFlow’s weather and wind app delivers unmatched accuracy. With stations on buoys, piers, and key waterfront locations, you get real conditions exactly where you sail. Plan with confidence using our Tempest Rapid Refresh Model combined with government data to deliver industry-leading Nearcast AI predictions. Then go deeper with radar, high-resolution forecast maps, and fully customizable alerts so you never miss a session. Real wind. Better sails. - Coastal observations from proprietary Tempest Weather Systems along with all public domain marine forecasts and reports (NOAA, NWS, METAR, ASOS, CWOP) including all major airports creating over 150,000 unique stations. - Exclusive Tempest Weather Systems deployed at key coastal locations report wind, rain, barometric pressure and more than 24 other weather observations. - Apple Watch compatibility - Live wind from our stations support powerful wind flow visualization – augmented by current station reports with advanced quality control. - Our Proprietary AI-enhanced Nearcast provides enhanced forecasting for temperature, wind gust, speed, direction, humidity, dewpoint, precipitation rate, probability of precipitation, and cloud cover percentage which is perfect for sailing. - Public domain forecast models including High Resolution Rapid Refresh (HRRR), North American Mesoscale Forecast System (NAM), Global Forecast System (GFS), Canadian Meteorological Centre Model (CMC) and Icosahedral Non Hydrostatic Model (ICON). - Create your own favorite station list to keep an eye on your go-to weather stations at all your marine and sailing spots. Check the tides in minutes so you never miss a day on the water. - Maps: Live and Forecasted Wind Map, Forecasted Temperature, Radar, Satellite, Precipitation and Clouds, as well as Nautical Charts. - Free subscription for unlimited wind notifications/alerts with customizable thresholds to email, text, or in-app. - Monitor National Weather Service (NWS) Marine forecasts, high surf warnings, and other to better anticipate waves and current conditions, for safer, more informed decisions on the water. Additional weather parameters: - Tides charts - Wave height, wave period - Water temperature - Sunrise / sunset - Moonrise / moonset - Historical wind statistics - Windy days per month - Wind direction distribution Go Beyond the Basics: Upgrade to Plus, Pro, or Gold membership to gain access to more weather stations, ad-free browsing, and more. - Access exclusive Pro and hurricane-proof stations at premier coastal locations and unlock SailFlow’s hyper-accurate Pro forecasts, updated daily by expert meteorologists for sailing hotspots coast to coast. - Detailed weather at points of interest to coastal residents and property owners near the ocean, rivers, and other bodies of water. On the water features: - Sea surface temperatures - Sea surface currents - Detailed historical wind statistics - Historical wind speed average by year Does your spot need a station? Join the Tempest Weather Network! Get a Tempest Weather System for your club, dock, or backyard. Get support: help.weatherflow.com/hc/en-us/categories/200419268-iKitesurf-iWindsurf-SailFlow-FishWeather-WindAlert Connect with Tempest: - facebook.com/tempestwx - twitter.com/tempest_wx - youtube.com/@tempestwx - instagram.com/tempest.earth Contact Tempest: help.weatherflow.com/hc/en-us/requests/new Website: tempest.earth By purchasing a subscription or downloading SailFlow you agree that you have read and accept our Privacy Policy and Terms of Use. got.wf/privacy got.wf/terms

Should you go sailing today? SailWindow answers in one glance, then shows you why. Built by a racing sailor for the hours before you leave the dock, SailWindow puts the official NOAA marine forecast, the nearest buoys, six wind models and a route planner in one app. No account, no ads, no subscription. ONE-GLANCE SAILING VERDICT • Good, Caution or No-Go for the hours ahead, based on wind, gusts, waves, rain and thunder • Tap the verdict to see exactly which limit was crossed and when • Set your own limits for each spot: a dinghy sailor and a 40-footer need different numbers SIX WIND MODELS, SIDE BY SIDE • Animated wind map with GFS, HRRR, ECMWF, ICON, GEM and Météo-France guidance • Scrub through the next 48 hours and tap anywhere for speed and direction • Model table lines up every model's wind speed and direction hour by hour, so you can see when the models agree, and when they don't ROUTE PLANNER FOR DISTANCE RACES AND DELIVERIES • Pick a start and a finish and compare routes from four wind models • Synchronized playback shows every model's boat over the changing wind • Hourly wind along each route, ETA spread and optional GFS ensemble check • Uses a measured J/105 polar. A planning aid, not a navigation system: routes do not avoid land, shoals, currents or waves. NOAA DATA, READ FOR YOU • NWS gridpoint forecast for wind, gusts, waves, wave period, temperature, rain and thunder • The NOAA marine text forecast for your zone, matched automatically and formatted for reading • Active marine warnings and Small Craft Advisories • Nearby NDBC buoys and shore stations on a map, with live wind, waves and pressure • Rain radar with animated recent frames and the official NOAA reflectivity layer MADE FOR WHERE YOU SAIL • Start on your own water: pick from 30 spots in California, Florida, the Gulf, the Atlantic coast, the Great Lakes, Hawaii and Puerto Rico, or use your location • Save more spots, like Point Loma, Key West or your home lake, and switch between them • Notifications when wind, gusts or waves cross your limits, when the verdict changes, or when a marine warning is issued • Dark mode that won't wreck your night vision in the cockpit • On iPhone Duo, the inner screen shows tabs in a side rail and the NOAA forecast beside your numbers Forecasts, alerts and buoy data come from NOAA, the National Weather Service and NDBC, so the full feature set covers U.S. coastal waters and the Great Lakes. The wind map and route planner work anywhere. SailWindow is for planning and situational awareness. Conditions change quickly; always check official sources and local conditions, and carry the required safety equipment.