Online Passage Planner for Sailors

Estuary Forecast Passage Planner is an online passage planner for sailors and small boat skippers navigating UK coastal waters. Plot a route on interactive sea charts, drop and reorder waypoints, add per-leg notes, anchor weather forecasts to your planned departure time, and reach UK tide predictions in one place.

Plan UK sailing passages online

Build a passage by clicking waypoints onto a Leaflet chart with OpenSeaMap navigational overlays. Set a planned departure time, choose your vessel and the planner instantly works out distance, bearings, leg times, ETAs and motoring fuel burn. Save unlimited passages against a free account.

Waypoint notes, weather and tides

Attach notes to each waypoint for hazards, transit marks, VHF channels and harbour information. See an integrated +24h marine weather forecast for wind, gusts and waves at the midpoint of your route, and jump straight to ADMIRALTY EasyTide for tidal predictions at major UK ports.

Export to GPX, CSV or JSON

Export any saved passage as GPX for chartplotters and apps such as Navionics, OpenCPN, iSailor and SavvyNavvy, as CSV for spreadsheets and crew briefings, or as JSON for programmatic use. You can also print a chart-table-friendly passage plan with waypoints, bearings, distances and weather summary.

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Not for primary navigation or commercial use. Always use official charts, tide tables, notices to mariners, and proper seamanship.