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Sea weather, wind, waves and swell. GRIB for sailors. Free coastal, Pro offshore
MarineGrib is sea weather for sailors, skippers and boaters. See wind, waves, swell and pressure on a marine chart. Scrub the next 48–72 hours, tap a point, check a buoy, and get Go / Wait for tomorrow. Built for harbor and coastal waters — and for crossings when you need a small GRIB over Starlink or Iridium. FREE • Full-screen sea map, pan and zoom • GFS wind, gusts, waves, swell and isobars • Time slider for the next 48–72 hours • Tap a point for a 72-hour spot forecast • Go / Wait / No-go for the next 48 hours • Buoys and shipping lanes • 5 saved spots • Works offline on the last downloaded snapshot PRO / ANNUAL • Live GFS and ECMWF to 15 days • Basin GRIB packs, typically under 50 KB for satellite • Isochrone routing and four departure windows • Swell trains, tides and currents • Ship traffic on the chart • 7-day Pro trial CREW (£49/mo) • Everything in Pro • Skipper plus 5 seats • Shared packs, routes and departure windows for the watch Not a chartplotter, AIS receiver or collision-avoidance tool. Always confirm with official forecasts and good seamanship. Website: https://marinegrib.com Privacy: https://marinegrib.com/privacy Terms: https://marinegrib.com/terms