Salish Tides is an offline-first map of tidal currents and tide heights for the Salish Sea. When you're online it shows real-time surface-current forecasts from the SalishSeaCast ocean model; when you're not, it falls back to harmonic predictions computed on your device — so it keeps working with no signal, out on the water.

It's a planning aid for paddlers, boaters, and anyone who works around the tide. It is not an official source for navigation — always consult official charts and current tables.