Tides Today & Tomorrow in Union, WA

TIDE TIMES for Monday, June 29, 2026
The tide is currently rising in Union, WA.
Next low tide : 11:12 am (-2.0 ft)
Next high tide : in 2h 37m at 3:20 am (10.3 ft)
Sunset today : 9:13 pm
Sunrise tomorrow : 5:18 am
Moon phase : Full Moon (100% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jul 2006

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat8:037.510:3311.84:176.03:051.55:199:12First Quarter1Sat
2Sun9:336.811:0011.55:065.03:443.05:209:12First Quarter2Sun
3Mon11:296.711:2311.25:544.04:284.55:219:12First Quarter3Mon
4Tue1:137.26:392.95:245.95:219:11First Quarter4Tue
5Wed2:368.27:221.76:377.15:229:11Waxing Gibbous5Wed
6Thu12:0810.93:429.48:040.67:538.05:239:10Waxing Gibbous6Thu
7Fri12:3910.84:3510.58:46-0.59:038.55:249:10Waxing Gibbous7Fri
8Sat1:1810.75:1911.59:28-1.610:078.75:249:10Waxing Gibbous8Sat
9Sun2:0310.76:0112.310:11-2.511:038.65:259:09Full Moon9Sun
10Mon2:5110.76:4012.810:54-3.211:538.45:269:08Full Moon10Mon
11Tue3:4310.67:1913.211:37-3.55:279:08Full Moon11Tue
12Wed4:3710.47:5613.312:427.912:20-3.45:289:07Waning Gibbous12Wed
13Thu5:3410.08:3213.21:307.21:03-2.85:299:06Waning Gibbous13Thu
14Fri6:379.49:0613.02:206.21:47-1.65:309:06Waning Gibbous14Fri
15Sat7:518.79:3912.83:125.02:320.15:319:05Waning Gibbous15Sat
16Sun9:208.110:1012.54:053.73:192.05:329:04Third Quarter16Sun
17Mon11:017.910:4112.14:592.34:104.15:339:03Third Quarter17Mon
18Tue12:448.35:540.95:126.15:349:02Third Quarter18Tue
19Wed2:189.26:50-0.26:277.65:359:01Waning Crescent19Wed
20Thu3:3610.37:44-1.27:468.55:369:00Waning Crescent20Thu
21Fri12:3611.24:3411.28:36-1.88:598.85:378:59Waning Crescent21Fri
22Sat1:2910.95:2011.99:25-2.310:048.75:388:58Waning Crescent22Sat
23Sun2:2510.75:5912.310:12-2.511:008.35:408:57New Moon23Sun
24Mon3:2010.46:3512.510:56-2.511:487.85:418:56New Moon24Mon
25Tue4:1110.27:0812.611:36-2.25:428:55New Moon25Tue
26Wed4:589.87:4012.512:327.212:14-1.75:438:54New Moon26Wed
27Thu5:439.48:1012.41:146.612:49-1.05:448:52Waxing Crescent27Thu
28Fri6:299.08:3812.11:576.01:240.05:468:51Waxing Crescent28Fri
29Sat7:188.59:0311.82:395.31:571.25:478:50Waxing Crescent29Sat
30Sun8:178.09:2411.43:214.62:312.65:488:49Waxing Crescent30Sun
31Mon9:297.69:4011.14:043.93:054.15:498:47First Quarter31Mon
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 7:16 am — 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 100% 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 (100% 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