Tides Today & Tomorrow in Union, WA

TIDE TIMES for Wednesday, July 15, 2026
The tide is currently rising in Union, WA.
Next low tide (tomorrow) : 1:01 am (6.8 ft)
Next high tide : in 3h 13m at 7:31 pm (13.4 ft)
Sunset today : 9:05 pm
Sunrise tomorrow : 5:31 am
Moon phase : New Moon (3% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jan 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri9:2912.67:457.91:531.13:596.07:594:32First Quarter1Fri
2Sat10:0112.49:307.42:372.44:514.97:594:33First Quarter2Sat
3Sun10:3312.211:447.83:303.75:413.47:594:34First Quarter3Sun
4Mon11:0812.14:385.26:291.87:594:35First Quarter4Mon
5Tue1:168.911:46 AM12.15:566.47:160.27:594:36Waxing Gibbous5Tue
6Wed2:2710.312:2912.17:117.38:04-1.37:584:37Waxing Gibbous6Wed
7Thu3:2711.61:1612.18:207.98:51-2.57:584:38Waxing Gibbous7Thu
8Fri4:1912.82:0512.19:238.19:38-3.37:584:40Full Moon8Fri
9Sat5:0713.52:5712.010:208.010:25-3.67:584:41Full Moon9Sat
10Sun5:5314.03:4911.711:147.711:11-3.47:574:42Full Moon10Sun
11Mon6:3714.14:4211.212:077.37:574:43Waning Gibbous11Mon
12Tue7:2014.05:3610.51:016.87:564:44Waning Gibbous12Tue
13Wed8:0213.76:369.612:41-1.51:566.17:564:46Waning Gibbous13Wed
14Thu8:4313.37:478.71:260.02:515.47:554:47Waning Gibbous14Thu
15Fri9:2212.89:128.02:111.73:484.77:544:48Third Quarter15Fri
16Sat10:0012.410:477.82:583.44:453.87:544:50Third Quarter16Sat
17Sun10:3811.93:505.05:393.07:534:51Third Quarter17Sun
18Mon12:208.211:15 AM11.64:526.46:292.17:524:53Third Quarter18Mon
19Tue1:419.011:54 AM11.36:017.47:151.37:514:54Waning Crescent19Tue
20Wed2:4410.012:3311.17:098.07:580.57:514:55Waning Crescent20Wed
21Thu3:3210.91:1311.08:128.28:39-0.17:504:57Waning Crescent21Thu
22Fri4:1311.61:5310.99:088.29:19-0.77:494:58Waning Crescent22Fri
23Sat4:4912.22:3210.89:588.09:58-1.17:485:00New Moon23Sat
24Sun5:2412.73:1110.710:437.810:34-1.37:475:01New Moon24Sun
25Mon5:5912.93:5010.511:267.411:10-1.27:465:03New Moon25Mon
26Tue6:3213.14:2910.312:087.17:455:04New Moon26Tue
27Wed7:0513.05:119.912:506.67:445:06Waxing Crescent27Wed
28Thu7:3612.95:589.512:20-0.31:336.07:425:07Waxing Crescent28Thu
29Fri8:0412.76:569.012:560.72:185.37:415:09Waxing Crescent29Fri
30Sat8:3112.48:088.51:331.93:064.47:405:10Waxing Crescent30Sat
31Sun8:5712.19:478.32:163.43:573.47:395:12First Quarter31Sun
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 10:16 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 3% 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 New Moon (3% 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