Sea Window: Marine Weather

Sailing weather, tides & wind

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Find your weather window. Sea Window shows the forecast at every point of your trip, timed to when you'll actually be there, and ranks the best times to leave over the next three days. Built for coastal sailors, cruisers and anglers whose trips are long enough for the weather to change on the way. WEATHER AT EVERY WAYPOINT, WHEN YOU GET THERE Set a route and your boat speed. Sea Window times the forecast to your arrival at each waypoint: wind and gusts, seas with the period next to the height (3 ft @ 8 s), tide, visibility and rain, on one timeline. See what it's like when you get there, and what the ride home looks like. THE BEST TIMES TO LEAVE, RANKED The Departure Advisor scores every departure over the next 72 hours for your whole trip, not just the hour you cast off, and tells you why: wind, seas and visibility along the way. IF THE MODELS ALIGN, YOU'LL KNOW A model-agreement badge shows where GFS, ICON and ECMWF agree for each day, and where they don't, so you know how much to trust the forecast before you commit. THE WHOLE MARINE PICTURE ON ONE SCREEN • 7-day hourly wind, gusts and direction • Waves, swell and wind waves with period and direction • Tide chart and tidal streams (NOAA stations in US waters) • Barometer with pressure trend, fog and squall risk • Sea surface temperature and currents WIND AND TIDE, MOVING ON THE MAP Animated wind and tidal-stream arrows over the water, with a scrubber to step through the hours ahead. Add NOAA charts, OpenSeaMap seamarks and depth contours as layers. ROUTES, TRIPS AND OFFLINE • Save unlimited routes and reuse them • Log trips with track, distance and the conditions you met • Download map regions and keep the last forecast and tides on your phone for when the signal drops ONE PRICE, NO ADS Everything is included in one subscription. Seven days free, then a monthly or yearly plan. The renewal price and date are shown before you commit, there are no hidden tiers, and you can cancel any time in your Apple ID settings. No ads and no bite scores, just the forecast. Weather and marine data from the ECMWF, ICON and GFS models, tides from NOAA CO-OPS, charts from NOAA and OpenSeaMap, bathymetry from GEBCO. Terms of Use: https://seawindow.app/terms Privacy Policy: https://seawindow.app/privacy

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Sea Window now speaks your language • The whole app is now available in English, Danish, Dutch, French, German, Italian, Norwegian, Portuguese (Brazil), Spanish and Swedish • Choose your language on the first screen, or change it any time in Account → Language • Sea Window now opens on the Weather tab, with the map one tap away • Sign in first, then answer a few setup questions. Already have an account? You skip the questions • Temperatures along your route now follow the unit you chose • If a screen ever runs into a problem, you can now try again with one tap instead of seeing a blank screen • Stability and reliability improvements

Version 1.0.4

The developer, Lonka Shiva Shankar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Purchases
    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Lonka Shiva Shankar
Size
129.2 MB
Category
Weather
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • iPad
    Requires iPadOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 9 more
  • English, Danish, Dutch, French, German, Italian, Norwegian Bokmål, Portuguese, Spanish, Swedish
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Sea Window
  • Developer Website
  • Privacy Policy
  • License Agreement

    • You Might Also Like