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 4h 01m 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 - Nov 2005

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:3811.23:2611.510:025.610:24-0.46:564:55New Moon1Tue
2Wed5:2311.93:4411.310:466.410:56-1.16:584:53New Moon2Wed
3Thu6:1012.34:0411.211:317.211:31-1.66:594:52New Moon3Thu
4Fri6:5912.54:3011.012:197.97:014:50Waxing Crescent4Fri
5Sat7:5412.65:0010.712:10-1.71:148.57:024:49Waxing Crescent5Sat
6Sun8:5212.55:3510.212:53-1.62:198.97:044:48Waxing Crescent6Sun
7Mon9:5212.56:209.51:43-1.23:348.77:054:46First Quarter7Mon
8Tue10:5012.47:278.52:40-0.54:528.07:074:45First Quarter8Tue
9Wed11:4212.49:317.73:440.45:586.77:084:43First Quarter9Wed
10Thu12:2512.54:521.46:495.07:104:42Waxing Gibbous10Thu
11Fri12:067.81:0212.56:002.57:333.17:114:41Waxing Gibbous11Fri
12Sat1:358.81:3612.57:033.68:141.37:134:40Waxing Gibbous12Sat
13Sun2:4410.02:0712.48:014.78:54-0.37:144:38Waxing Gibbous13Sun
14Mon3:4511.22:3712.38:575.89:33-1.57:164:37Full Moon14Mon
15Tue4:3812.13:0512.19:506.710:12-2.27:174:36Full Moon15Tue
16Wed5:2812.73:3211.810:407.410:51-2.47:184:35Full Moon16Wed
17Thu6:1713.13:5811.311:308.011:29-2.37:204:34Full Moon17Thu
18Fri7:0513.14:2310.812:218.47:214:33Waning Gibbous18Fri
19Sat7:5412.94:5010.312:09-1.81:178.67:234:32Waning Gibbous19Sat
20Sun8:4412.75:199.612:49-1.02:188.67:244:31Waning Gibbous20Sun
21Mon9:3412.45:538.91:32-0.23:258.47:264:30Waning Gibbous21Mon
22Tue10:2312.26:428.02:180.74:367.77:274:29Third Quarter22Tue
23Wed11:0712.08:117.13:071.75:396.87:284:29Third Quarter23Wed
24Thu11:4611.911:206.94:012.76:255.67:304:28Third Quarter24Thu
25Fri12:1911.95:003.77:024.37:314:27Third Quarter25Fri
26Sat12:547.512:4811.85:594.77:362.97:324:26Waning Crescent26Sat
27Sun2:028.51:1211.76:575.68:101.67:344:26Waning Crescent27Sun
28Mon2:599.71:3411.77:536.48:430.37:354:25Waning Crescent28Mon
29Tue3:4910.91:5611.68:487.19:18-0.97:364:25Waning Crescent29Tue
30Wed4:3611.92:2111.69:407.79:54-1.87:374:24New Moon30Wed
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