Tides Today & Tomorrow in Union, WA

TIDE TIMES for Friday, July 10, 2026
The tide is currently rising in Union, WA.
Next low tide : 7:56 pm (8.5 ft)
Next high tide : in 7h 07m at 3:38 pm (10.3 ft)
Sunset today : 9:08 pm
Sunrise tomorrow : 5:26 am
Moon phase : Waning Crescent (18% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jun 1988

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed4:1410.87:5213.112:208.312:05-3.05:199:01Full Moon1Wed
2Thu4:5210.58:3913.21:128.512:47-3.15:189:02Waning Gibbous2Thu
3Fri5:3410.19:2513.22:078.41:31-2.85:189:03Waning Gibbous3Fri
4Sat6:239.510:0913.03:068.02:18-2.15:179:03Waning Gibbous4Sat
5Sun7:248.610:5112.84:077.23:07-1.05:179:04Third Quarter5Sun
6Mon8:527.611:3112.65:086.04:010.55:169:05Third Quarter6Mon
7Tue11:017.16:054.54:592.35:169:06Third Quarter7Tue
8Wed12:0812.412:597.56:582.76:034.15:169:06Third Quarter8Wed
9Thu12:4412.22:298.57:461.07:115.75:159:07Waning Crescent9Thu
10Fri1:1812.03:439.88:32-0.68:196.95:159:08Waning Crescent10Fri
11Sat1:5211.94:4411.09:16-1.89:247.85:159:08Waning Crescent11Sat
12Sun2:2711.75:3611.910:00-2.610:258.35:159:09New Moon12Sun
13Mon3:0211.46:2312.510:42-3.111:218.45:159:09New Moon13Mon
14Tue3:3911.17:0712.811:24-3.15:149:10New Moon14Tue
15Wed4:1610.77:4912.912:148.412:04-2.95:149:10New Moon15Wed
16Thu4:5410.28:3012.81:058.312:44-2.45:149:11Waxing Crescent16Thu
17Fri5:319.69:0912.61:578.01:23-1.75:159:11Waxing Crescent17Fri
18Sat6:128.99:4712.42:507.62:01-0.85:159:12Waxing Crescent18Sat
19Sun6:598.210:2212.13:447.02:400.25:159:12Waxing Crescent19Sun
20Mon8:007.410:5411.84:376.33:181.55:159:12First Quarter20Mon
21Tue9:346.711:2311.65:285.33:592.95:159:12First Quarter21Tue
22Wed11:436.611:4811.36:154.24:464.35:159:12First Quarter22Wed
23Thu1:267.26:593.05:455.75:169:13First Quarter23Thu
24Fri12:1011.12:458.27:401.76:566.95:169:13Waxing Gibbous24Fri
25Sat12:3311.03:499.48:190.58:087.85:169:13Waxing Gibbous25Sat
26Sun1:0210.94:4110.68:59-0.79:158.35:179:13Waxing Gibbous26Sun
27Mon1:3810.95:2711.69:40-1.810:178.65:179:13Waxing Gibbous27Mon
28Tue2:1810.96:1012.410:23-2.711:138.75:189:13Full Moon28Tue
29Wed3:0410.96:5213.011:05-3.45:189:12Full Moon29Wed
30Thu3:5210.87:3313.312:058.511:49 AM-3.85:199:12Full Moon30Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9445478)

Common Questions About Union, WA Tides

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What time does the tide turn (slack tide) in Union, WA today?

Slack tide in Union, WA is approximately 5:47 pm — 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 Union, WA?

Union, WA is currently in a spring phase. Tonight's moon is 18% 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 near their weekly maximum.

What datum are Union, 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 Union, WA?

Tide predictions for Union, 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 Union, WA?

Tide data for Union, WA is sourced from NOAA Station #9445478. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9445478.

What is the moon phase in Union, WA tonight?

Tonight the moon over Union, WA is Waning Crescent (18% illuminated). This places Union, WA in a spring tide cycle, so tidal ranges are near their weekly maximum 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