What is OpenSeaMap?
OpenSeaMap overlays seamarks such as buoys, beacons and lights, harbours and anchorages on OpenStreetMap, with community depth data. It is a free nautical map made by volunteers.
Free Open data
OpenSeaMap
Free nautical chart with buoys, lights and harbours from OpenStreetMap
- Coverage
- Worldwide
- Updates
- Community
- Price
- Free
- Sign-up
- Not needed
- View
- Flat map
What you can do
- Seamarks, lights and harbours
- Community depth data
- Sport and harbour layers
The details
- Coverage
- Worldwide
- Updates
- Continuously (community edits)
- Data source
- OpenStreetMap and community depth data
- Made by
- OpenSeaMap contributors (community project)
- Price
- Free
- Account
- No account needed
- On phones
- Works well on phones
- Map view
- Flat map
Tips for using OpenSeaMap
- Not for navigation alone: always cross-check with official charts.
Who it is for
OpenSeaMap is especially useful for hikers & outdoor fans.
Questions about OpenSeaMap
Is OpenSeaMap free?
Yes. OpenSeaMap is free to use.
Do I need an account to use OpenSeaMap?
No. You can open the map and use it without signing up.
How often is OpenSeaMap updated?
It changes continuously as the community adds and edits information.
Where does OpenSeaMap get its data?
OpenStreetMap and community depth data.
Can I use OpenSeaMap on my phone?
Yes. The website works well in a phone browser.
What are some alternatives to OpenSeaMap?
Similar maps include AllTrails, Strava Global Heatmap, map.geo.admin.ch and OpenTopoMap. See the full list of OpenSeaMap alternatives on ColorfulMaps.
Summary based on public information about OpenSeaMap. Features and prices change; the map's own website has the latest details.
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