Tides Today & Tomorrow in Union, WA

TIDE TIMES for Tuesday, June 30, 2026
The tide is currently rising in Union, WA.
Next low tide (tomorrow) : 12:52 am (8.0 ft)
Next high tide : in 6h 27m at 7:31 pm (12.5 ft)
Sunset today : 9:12 pm
Sunrise tomorrow : 5:19 am
Moon phase : Full Moon (99% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jan 2006

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun6:3814.13:5711.112:028.57:594:32Waxing Crescent1Sun
2Mon7:1814.14:5410.612:537.87:594:33Waxing Crescent2Mon
3Tue7:5713.95:579.812:24-2.51:476.97:594:34Waxing Crescent3Tue
4Wed8:3313.77:158.91:10-1.12:425.77:594:35Waxing Crescent4Wed
5Thu9:0913.38:538.21:560.73:394.37:594:36First Quarter5Thu
6Fri9:4313.010:428.12:452.84:362.97:584:37First Quarter6Fri
7Sat10:1712.63:404.95:321.57:584:39First Quarter7Sat
8Sun12:278.710:52 AM12.34:466.86:250.37:584:40Waxing Gibbous8Sun
9Mon1:579.811:30 AM12.06:028.27:16-0.67:574:41Waxing Gibbous9Mon
10Tue3:0810.912:1411.77:189.08:04-1.37:574:42Waxing Gibbous10Tue
11Wed4:0011.81:0111.48:289.38:50-1.77:574:43Waxing Gibbous11Wed
12Thu4:4212.51:4911.29:299.29:33-1.97:564:45Full Moon12Thu
13Fri5:1912.92:3610.910:218.810:14-1.97:554:46Full Moon13Fri
14Sat5:5313.13:2110.711:068.410:52-1.77:554:47Full Moon14Sat
15Sun6:2713.14:0310.311:508.011:28-1.27:544:49Full Moon15Sun
16Mon6:5913.14:449.912:337.57:544:50Waning Gibbous16Mon
17Tue7:2912.95:279.412:03-0.51:166.97:534:51Waning Gibbous17Tue
18Wed7:5712.76:158.812:360.41:596.37:524:53Waning Gibbous18Wed
19Thu8:2212.37:138.21:081.62:435.57:514:54Waning Gibbous19Thu
20Fri8:4312.08:307.81:403.03:274.77:504:56Third Quarter20Fri
21Sat8:5811.710:187.72:134.54:133.87:494:57Third Quarter21Sat
22Sun9:1411.52:526.05:022.87:494:59Third Quarter22Sun
23Mon12:098.39:37 AM11.33:487.45:511.87:485:00Third Quarter23Mon
24Tue1:399.410:12 AM11.25:258.66:410.67:475:02Waning Crescent24Tue
25Wed2:4510.610:59 AM11.16:589.37:31-0.67:465:03Waning Crescent25Wed
26Thu3:3311.711:59 AM11.18:129.48:20-1.77:445:05Waning Crescent26Thu
27Fri4:1512.61:0511.29:139.29:09-2.67:435:06Waning Crescent27Fri
28Sat4:5313.32:1011.310:058.69:55-3.17:425:08New Moon28Sat
29Sun5:2913.73:1511.310:527.810:41-3.17:415:09New Moon29Sun
30Mon6:0413.94:1811.211:376.811:25-2.57:405:11New Moon30Mon
31Tue6:3813.85:2110.812:245.77:395:12Waxing Crescent31Tue
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 10:11 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 99% 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 Full Moon (99% 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