Tides Today & Tomorrow in Seattle, WA

TIDE TIMES for Monday, August 17, 2026
The tide is currently rising in Seattle, WA.
Next low tide (tomorrow) : 3:40 am (1.4 ft)
Next high tide : in 5h 11m at 8:56 pm (11.2 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 6:08 am
Moon phase : Waxing Crescent (28% illuminated)
Tide Station Location : Station #9447130
Common Questions About Tides

Seattle, WA Tides - Dec 1932

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu8:1512.86:0710.212:27-3.21:477.97:364:20Waxing Crescent1Thu
2Fri9:0512.57:119.31:16-2.23:007.37:384:19Waxing Crescent2Fri
3Sat9:5512.38:278.32:08-0.84:186.57:394:19First Quarter3Sat
4Sun10:4112.19:577.63:020.75:295.37:404:19First Quarter4Sun
5Mon11:2411.811:427.43:592.36:274.07:414:18First Quarter5Mon
6Tue12:0111.65:013.97:142.77:424:18First Quarter6Tue
7Wed1:268.012:3511.36:105.47:521.67:434:18Waxing Gibbous7Wed
8Thu2:498.91:0511.17:236.68:240.57:444:18Waxing Gibbous8Thu
9Fri3:5210.01:3410.88:327.48:53-0.37:454:18Waxing Gibbous9Fri
10Sat4:4110.82:0410.69:328.09:22-0.97:464:18Waxing Gibbous10Sat
11Sun5:2011.42:3410.410:228.39:52-1.37:474:17Full Moon11Sun
12Mon5:5411.83:0610.211:058.510:25-1.67:484:18Full Moon12Mon
13Tue6:2512.03:4110.011:438.511:00-1.77:494:18Full Moon13Tue
14Wed6:5412.14:179.812:188.47:504:18Full Moon14Wed
15Thu7:2512.24:569.612:568.37:514:18Waning Gibbous15Thu
16Fri7:5712.25:419.312:16-1.51:378.07:514:18Waning Gibbous16Fri
17Sat8:3112.26:328.912:56-1.12:247.57:524:18Waning Gibbous17Sat
18Sun9:0612.37:358.41:38-0.53:156.77:534:19Waning Gibbous18Sun
19Mon9:4112.38:527.92:220.54:095.67:534:19Third Quarter19Mon
20Tue10:1612.310:227.63:081.95:034.27:544:20Third Quarter20Tue
21Wed10:5212.34:003.65:542.57:544:20Third Quarter21Wed
22Thu12:038.011:29 AM12.25:025.36:430.87:554:21Waning Crescent22Thu
23Fri1:448.912:0812.26:146.87:30-0.97:554:21Waning Crescent23Fri
24Sat3:0610.212:5112.27:327.98:17-2.27:564:22Waning Crescent24Sat
25Sun4:0911.41:3712.18:458.59:04-3.27:564:22Waning Crescent25Sun
26Mon5:0012.22:2512.09:498.79:51-3.77:564:23New Moon26Mon
27Tue5:4612.73:1711.810:478.510:38-3.87:574:24New Moon27Tue
28Wed6:2913.04:1011.411:418.211:24-3.47:574:25New Moon28Wed
29Thu7:1013.05:0610.812:357.77:574:25Waxing Crescent29Thu
30Fri7:4912.96:0410.112:11-2.61:307.07:574:26Waxing Crescent30Fri
31Sat8:2612.77:119.212:56-1.52:276.27:574:27Waxing Crescent31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9447130)

Common Questions About Seattle, WA Tides

Show All
What time does the tide turn (slack tide) in Seattle, WA today?

Slack tide in Seattle, WA is approximately 12:18 am — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

Is this week a spring tide or neap tide in Seattle, WA?

Seattle, WA is currently in a transitional phase. Tonight's moon is 28% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are shifting between spring and neap.

What datum are Seattle, WA tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Seattle, WA?

Tide predictions for Seattle, WA come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Seattle, WA?

Tide data for Seattle, WA is sourced from NOAA Station #9447130. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9447130.

What is the moon phase in Seattle, WA tonight?

Tonight the moon over Seattle, WA is Waxing Crescent (28% illuminated). This places Seattle, WA in a transitional tide cycle, so tidal ranges are shifting between spring and neap this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA