Tides Today & Tomorrow in Union, WA

TIDE TIMES for Wednesday, July 15, 2026
The tide is currently falling in Union, WA.
Next low tide : in 6m at 12:01 pm (-3.9 ft)
Next high tide : 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 - May 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat12:5312.111:23 AM8.06:556.46:171.15:558:23First Quarter1Sat
2Sun1:4612.11:178.17:575.37:221.95:538:24Waxing Gibbous2Sun
3Mon2:3012.12:378.78:473.98:212.65:528:26Waxing Gibbous3Mon
4Tue3:0912.13:429.49:312.69:163.35:508:27Waxing Gibbous4Tue
5Wed3:4412.04:3810.210:101.510:064.15:498:28Waxing Gibbous5Wed
6Thu4:1511.85:2810.910:470.510:534.85:478:30Full Moon6Thu
7Fri4:4411.66:1411.411:23-0.211:385.45:468:31Full Moon7Fri
8Sat5:1011.26:5811.711:57-0.65:448:32Full Moon8Sat
9Sun5:3110.87:4211.912:236.012:31-0.75:438:34Full Moon9Sun
10Mon5:5010.48:2712.01:086.61:05-0.65:428:35Waning Gibbous10Mon
11Tue6:099.99:1411.91:557.11:41-0.35:408:36Waning Gibbous11Tue
12Wed6:339.510:0311.72:487.52:180.15:398:38Waning Gibbous12Wed
13Thu7:039.010:5411.63:467.62:590.55:378:39Waning Gibbous13Thu
14Fri7:428.411:4611.54:517.53:451.15:368:40Third Quarter14Fri
15Sat8:377.75:587.14:381.75:358:41Third Quarter15Sat
16Sun12:3411.510:00 AM7.16:576.35:372.35:348:43Third Quarter16Sun
17Mon1:1611.612:337.07:455.26:402.85:338:44Third Quarter17Mon
18Tue1:5211.62:077.78:253.97:413.45:318:45Waning Crescent18Tue
19Wed2:2411.73:148.89:022.58:394.05:308:46Waning Crescent19Wed
20Thu2:5411.74:1310.09:391.09:354.65:298:48Waning Crescent20Thu
21Fri3:2311.75:0711.210:17-0.510:295.35:288:49New Moon21Fri
22Sat3:5311.75:5912.210:57-1.911:226.05:278:50New Moon22Sat
23Sun4:2411.76:5112.911:38-2.85:268:51New Moon23Sun
24Mon4:5911.57:4413.312:166.612:21-3.45:258:52Waxing Crescent24Mon
25Tue5:3711.28:3813.41:107.11:06-3.45:248:53Waxing Crescent25Tue
26Wed6:1810.69:3313.32:097.41:55-3.05:238:54Waxing Crescent26Wed
27Thu7:069.810:2813.13:127.42:47-2.15:238:55Waxing Crescent27Thu
28Fri8:068.811:2212.84:207.03:42-0.85:228:56First Quarter28Fri
29Sat9:367.85:306.24:400.55:218:57First Quarter29Sat
30Sun12:1212.511:40 AM7.36:365.05:422.05:208:58First Quarter30Sun
31Mon12:5912.31:207.67:333.76:453.35:208:59Waxing Gibbous31Mon
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 3:46 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