Where the data comes from.

Updated September 28, 2026

Ebb & Flood is built on public data. These agencies and groups provide their data publicly. They don't make, review or endorse Ebb & Flood.

Currents and tides

NOAA Center for Operational Oceanographic Products and Services (CO-OPS)

Current and tide predictions for every station.
U.S. government work, public domain · tidesandcurrents.noaa.gov

Map

OpenStreetMap contributors

The base map, place names, and some launch, campsite and beach locations.
Open Database License (ODbL) · openstreetmap.org/copyright

Protomaps

Map tiles and map design, built from OpenStreetMap.
Map data ODbL; map design BSD license · protomaps.com

U.S. Geological Survey, The National Map

Satellite imagery (Map › Satellite).
U.S. government work, public domain · usgs.gov/programs/national-geospatial-program/national-map

NOAA Office of Coast Survey

Nautical chart overlay (Map › NOAA chart).
U.S. government work, public domain · nauticalcharts.noaa.gov

Launch and camp sites (Washington)

Washington State Parks and Recreation Commission

Campsites, boat launches, mooring buoys, park facilities and park boundaries.
Washington State open data (geo.wa.gov) · parks.wa.gov

Washington Department of Fish and Wildlife

Water access sites.
Washington State open data (geo.wa.gov) · wdfw.wa.gov/places-to-go/water-access-sites

Washington Department of Ecology, Coastal Atlas

Public shore access points marked as boat or kayak launches (field survey, updated as needed).
Washington State public data · apps.ecology.wa.gov/coastalatlas

Washington Department of Natural Resources

Recreation sites.
Washington State open data (geo.wa.gov) · dnr.wa.gov/Recreation

Washington Water Trails Association

Cascadia Marine Trail campsite locations and notices, from WWTA's public site pages. Check the latest with WWTA before you go.
Information as published by WWTA · wwta.org/water-trails/cascadia-marine-trail

How site details are shown

Launch and camp site cards show only what each source publishes, such as whether a site has a boat launch, campsites, restrooms or mooring buoys, with the source and the month it was downloaded. Ebb & Flood doesn't guess missing details. Reservations, fees, passes, rules and closures change, so each card links to the site's own page. Always check it before you go.

Cascadia Marine Trail campsites are for people arriving by human- or wind-powered boat. Check the latest site information and notices with the Washington Water Trails Association.

See something wrong?

Tap Report a problem on a site's card in the app, or email us. A wrong location is the most useful thing to tell us.

Map data © OpenStreetMap contributors, available under the Open Database License. OpenStreetMap is a trademark of the OpenStreetMap Foundation and is used here to credit the data, not to suggest endorsement.