Your first mate for every passage
Weather routing that explains itself. Plan routes with comfort-aware intelligence, not just a line on a map.
Why OpenSail
Everything you need for safer passages
We combine institutional-grade forecast data with comfort-aware routing to help you make better decisions at sea.
4D Weather Visualization
Animated wind particles, wave height heatmaps, ocean currents, and pressure systems — all on a stunning interactive map with a time-scrubbing slider.
Comfort-Aware Routing
Four routing modes — Fastest, Balanced, Family, and Comfort+ — with per-segment comfort scoring, heel angle estimation, and slamming risk analysis.
Multi-Model Forecasts
GFS global atmospheric forecasts paired with CMEMS ocean physics and wave models for currents and sea state. ECMWF AIFS and regional high-resolution models are on the roadmap.
Track My Passage
Share your voyage live with family and friends. GPS tracking via cellular, Starlink, or Iridium with real-time weather conditions overlay.
Departure Planner
Compare 5+ departure times side-by-side. Find the weather window that balances speed, comfort, and safety for your crew.
Pauseable Subscriptions
On the hard for winter? Pause your subscription and resume when you splash. No penalties, no hassle.
Ready to plan your next passage?
Start with the free tier. Upgrade when you're ready to go offshore.
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