Seattle, WA tide times

The hero block shows the next high tide at the Pier 36 gauge in local Pacific time, height above MLLW. The 7-day table breaks out all daily extremes — note that Puget Sound's mixed semidiurnal pattern produces a sharp asymmetry, with the lower low often more than a metre below the higher low in summer.

Puget Sound is a long, deep inland sea connected to the Pacific via the Strait of Juan de Fuca. The tidal wave that enters the strait amplifies as it propagates inland, so the range at Seattle (about 2.3 metres mean) is roughly twice what you'd see on the open Washington coast. Olympia at the head of the Sound runs higher still.

Seattle's lowest-low tides cluster around new and full moons, with the biggest summer-afternoon lows at Discovery Park, Lincoln Park, and the West Seattle shoreline. The lower of the two daily lows is what to watch — when it falls below 0 metres MLLW, intertidal shelf opens up that's covered the rest of the month. The 7-day table on this page flags each day's lowest predicted tide.

NOAA CO-OPS station 9447130, Seattle (Pier 36). NOAA's harmonic predictions for Puget Sound stations are calibrated against decades of gauge data at each location. Accuracy is high under normal weather; storm surge and strong wind setup down the Sound can shift actual water level by 20–30 cm or more.

No. For piloting in Puget Sound use NOAA's authoritative tide and current products and USCG notices. Currents at the Tacoma Narrows, Deception Pass, and Agate Pass are some of the strongest in the lower 48 — those are real-time navigational decisions, not tide-table decisions.