Tidewindow

Seattle (Puget Sound) tide windows

NOAA 9447130

Central Puget Sound reference station. Summer minus tides here expose broad gravel-and-boulder flats at Alki and Constellation Park.

Covers: Alki Beach · Constellation Park · Golden Gardens

Next best window · computed 2026-10-04

Oct 5, 2026 (Mon): the tide bottoms at 0.1 ft at 6:42 AM — walkable 5:30 AM–8:00 AM, arrive by 5:42 AM. 22 · SkipForecast near the low: Partly Sunny, 66°F (as of 2026-10-04 — predictions aren't observations; check conditions before you go).

sunrise+1.0 ft walkable0.1 ft · 6:42 AM

Every daylight window, next 30 days

Heights in feet MLLW from NOAA station 9447130 (Seattle) predictions. ✳ = federal holiday.

DateLowHeightWindowDaylightScore
Sun5:29 AM-0.4 ft3:55 AM–7:05 AMnight0 · Skip
Mon6:42 AM0.1 ft5:30 AM–8:00 AM0h 46m22 · Skip
Tue7:51 AM0.5 ft6:55 AM–8:45 AM1h 29m21 · Skip
Sat11:45 PM0.0 ft10:40 PM–12:55 AMnight0 · Skip
Mon ✳12:17 AM-0.6 ft10:50 PM–1:50 AMnight0 · Skip
Tue12:50 AM-1.0 ft11:10 PM–2:30 AMnight0 · Skip
Wed1:24 AM-1.0 ft11:40 PM–3:10 AMnight0 · Skip
Thu2:03 AM-0.7 ft12:25 AM–3:40 AMnight0 · Skip
Fri2:45 AM-0.2 ft1:20 AM–4:10 AMnight0 · Skip
Sat3:34 AM0.5 ft2:35 AM–4:30 AMnight0 · Skip
Sat10:39 PM0.3 ft9:45 PM–11:35 PMnight0 · Skip
Sun11:13 PM-1.1 ft9:35 PM–12:55 AMnight0 · Skip
Mon11:50 PM-2.2 ft9:50 PM–1:50 AMnight0 · Skip
Wed12:31 AM-2.8 ft10:20 PM–2:40 AMnight0 · Skip
Thu1:16 AM-3.0 ft10:55 PM–3:30 AMnight0 · Skip
Fri2:05 AM-2.7 ft11:45 PM–4:20 AMnight0 · Skip
Sat2:59 AM-2.0 ft12:50 AM–5:05 AMnight0 · Skip
Sun2:58 AM-1.0 ft1:10 AM–4:45 AMnight0 · Skip
Mon4:03 AM0.2 ft2:50 AM–5:15 AMnight0 · Skip

Next 7 days of high and low tides

The complete high/low sequence from NOAA station 9447130, in local time. Tidewindow's scored table above is the smaller decision set: lows under +1.0 ft with a usable shoreline window.

NOAA 9447130 predictions · feet MLLW · local time
DateTypeTimeHeight
SunLow5:29 AM-0.4 ft
SunHigh1:45 PM10.7 ft
SunLow7:35 PM7.4 ft
SunHigh11:36 PM8.7 ft
MonLow6:42 AM0.1 ft
MonHigh2:41 PM11.0 ft
MonLow8:43 PM6.2 ft
TueHigh1:14 AM8.7 ft
TueLow7:51 AM0.5 ft
TueHigh3:22 PM11.3 ft
TueLow9:29 PM4.8 ft
WedHigh2:36 AM9.1 ft
WedLow8:52 AM1.0 ft
WedHigh3:53 PM11.5 ft
WedLow10:07 PM3.4 ft
ThuHigh3:44 AM9.6 ft
ThuLow9:45 AM1.6 ft
ThuHigh4:20 PM11.5 ft
ThuLow10:42 PM2.1 ft
FriHigh4:43 AM10.0 ft
FriLow10:32 AM2.4 ft
FriHigh4:44 PM11.5 ft
FriLow11:14 PM0.9 ft
SatHigh5:35 AM10.4 ft
SatLow11:16 AM3.5 ft
SatHigh5:08 PM11.4 ft
SatLow11:45 PM0.0 ft

Monthly calendars

July 2026August 2026September 2026October 2026November 2026

What's in the pools right now

Research-grade observations within 5 km in the last 60 days, via iNaturalist (data © contributors, CC BY-NC).

SpeciesScientific nameObservations
Horned NudibranchHermissenda crassicornis12
Rough Keyhole LimpetDiodora aspera8
White-and-orange-tipped NudibranchAntiopella fusca8
Woody ChitonMopalia lignosa7
White-lined DironaDirona albolineata6
—Aeolidia5
Hooded NudibranchMelibe leonina5
Giant NudibranchDendronotus iris4
Rocky AeolidEubranchulus rupium4
Monterey DoridDoris montereyensis3

Quick answers

When is the next good low tide at Seattle (Puget Sound)?

Oct 5, 2026 (Mon): a 0.1 ft low at 6:42 AM, walkable from 5:30 AM to 8:00 AM — score 22/100. Computed from NOAA station 9447130 predictions.

How low does the tide need to be at Seattle (Puget Sound)?

Tidewindow counts a window whenever the predicted height falls below +1.0 ft MLLW, and scores depth from +0.5 ft (0 points) to −2.0 ft (50 points). The lower the tide, the more of the intertidal zone is exposed — minus tides (below 0 ft) are when Alki Beach is at its best.

How many daylight minus tides does Seattle (Puget Sound) get in the next 30 days?

0 of the next 30 days' 13 minus tides overlap daylight by at least 30 minutes, as of 2026-10-04. The full list is in the table above.

Safety: tide predictions are astronomical forecasts, not observations — wind and swell change actual water levels. Follow posted rules at protected areas, and never turn your back on the ocean. See our methodology for exactly how windows and scores are computed.