Tides Today & Tomorrow in Union, WA

TIDE TIMES for Thursday, August 6, 2026
The tide is currently falling in Union, WA.
Next low tide : in 2h 08m at 4:50 pm (7.5 ft)
Next high tide : 10:08 pm (11.2 ft)
Sunset today : 8:38 pm
Sunrise tomorrow : 5:57 am
Moon phase : Third Quarter (42% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Oct 2094

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri12:3410.94:470.85:557.77:126:50Third Quarter1Fri
2Sat1:4011.15:501.27:137.47:136:48Third Quarter2Sat
3Sun2:3311.36:521.58:156.87:156:46Waning Crescent3Sun
4Mon1:168.43:1411.57:501.69:036.07:166:44Waning Crescent4Mon
5Tue2:248.83:4911.78:411.79:435.17:186:43Waning Crescent5Tue
6Wed3:209.24:2011.89:271.810:194.27:196:41Waning Crescent6Wed
7Thu4:099.74:4911.810:102.110:533.37:206:39New Moon7Thu
8Fri4:5410.25:1511.710:502.511:262.57:226:37New Moon8Fri
9Sat5:3710.65:3811.511:293.111:591.87:236:35New Moon9Sat
10Sun6:2010.95:5711.312:073.87:256:33New Moon10Sun
11Mon7:0311.06:1311.012:311.212:454.77:266:31Waxing Crescent11Mon
12Tue7:4911.16:3010.71:030.91:265.67:276:29Waxing Crescent12Tue
13Wed8:4011.16:5110.41:370.62:116.67:296:27Waxing Crescent13Wed
14Thu9:3811.17:1810.02:150.53:067.47:306:25Waxing Crescent14Thu
15Fri10:4411.17:549.63:000.54:147.97:326:23First Quarter15Fri
16Sat11:5411.28:449.13:530.55:348.07:336:21First Quarter16Sat
17Sun12:5911.54:570.76:507.57:356:20First Quarter17Sun
18Mon1:5211.96:070.87:506.57:366:18First Quarter18Mon
19Tue12:038.32:3612.27:141.08:405.27:376:16Waxing Gibbous19Tue
20Wed1:568.83:1512.48:161.29:243.77:396:14Waxing Gibbous20Wed
21Thu3:119.73:5012.59:131.610:062.17:406:12Waxing Gibbous21Thu
22Fri4:1510.74:2412.610:062.310:480.67:426:11Full Moon22Fri
23Sat5:1311.64:5612.410:573.211:29-0.67:436:09Full Moon23Sat
24Sun6:0812.25:2712.211:474.27:456:07Full Moon24Sun
25Mon7:0312.65:5711.812:10-1.312:365.37:466:05Waning Gibbous25Mon
26Tue7:5712.66:2511.212:52-1.61:266.37:486:04Waning Gibbous26Tue
27Wed8:5412.56:5210.61:35-1.42:217.17:496:02Waning Gibbous27Wed
28Thu9:5212.27:209.82:20-0.83:227.77:516:00Waning Gibbous28Thu
29Fri10:5312.07:539.13:08-0.14:317.97:525:59Third Quarter29Fri
30Sat11:5511.88:418.24:010.85:487.67:545:57Third Quarter30Sat
31Sun12:5211.74:591.67:017.07:555:56Third Quarter31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9445478)

Common Questions About Union, WA Tides

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

Slack tide in Union, WA is approximately 7:29 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 neap phase. Tonight's moon is 42% 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 minimum.

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 Third Quarter (42% illuminated). This places Union, WA in a neap tide cycle, so tidal ranges are near their weekly minimum 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