Tides Today & Tomorrow in Union, WA

TIDE TIMES for Saturday, August 8, 2026
The tide is currently rising in Union, WA.
Next low tide : 7:25 am (-1.2 ft)
Next high tide (tomorrow) : in 1h 36m at 10:54 pm (11.0 ft)
Sunset today : 8:37 pm
Sunrise tomorrow : 5:58 am
Moon phase : Third Quarter (31% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jun 2097

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat7:287.911:3411.95:067.43:310.75:199:02Third Quarter1Sat
2Sun8:397.16:046.64:191.75:189:02Third Quarter2Sun
3Mon12:1011.810:31 AM6.66:515.45:142.75:189:03Third Quarter3Mon
4Tue12:4211.71:026.97:314.06:173.95:179:04Third Quarter4Tue
5Wed1:1011.62:298.08:082.47:245.05:179:05Waning Crescent5Wed
6Thu1:3611.63:379.48:460.78:296.05:169:06Waning Crescent6Thu
7Fri2:0311.64:3610.89:25-1.09:326.95:169:06Waning Crescent7Fri
8Sat2:3411.75:3012.010:06-2.510:337.65:169:07New Moon8Sat
9Sun3:1011.76:2213.010:49-3.611:318.15:159:08New Moon9Sun
10Mon3:5011.67:1313.511:34-4.35:159:08New Moon10Mon
11Tue4:3311.48:0413.712:278.312:21-4.55:159:09Waxing Crescent11Tue
12Wed5:2010.98:5413.71:258.31:09-4.05:159:09Waxing Crescent12Wed
13Thu6:1110.29:4313.42:258.01:58-3.15:159:10Waxing Crescent13Thu
14Fri7:119.210:2913.13:287.32:49-1.85:159:10Waxing Crescent14Fri
15Sat8:328.111:1312.84:336.33:41-0.15:159:11First Quarter15Sat
16Sun10:247.211:5412.45:365.14:351.75:159:11First Quarter16Sun
17Mon12:157.16:353.75:323.55:159:12First Quarter17Mon
18Tue12:3212.11:507.77:262.36:345.15:159:12Waxing Gibbous18Tue
19Wed1:0711.83:088.78:111.07:376.35:159:12Waxing Gibbous19Wed
20Thu1:4011.54:129.78:520.08:397.35:159:12Waxing Gibbous20Thu
21Fri2:1011.25:0210.79:31-0.89:387.85:169:13Waxing Gibbous21Fri
22Sat2:3911.05:4511.410:08-1.410:348.15:169:13Full Moon22Sat
23Sun3:0710.76:2512.010:46-1.811:258.25:169:13Full Moon23Sun
24Mon3:3610.57:0312.311:22-2.05:179:13Full Moon24Mon
25Tue4:0710.27:4212.512:148.211:59 AM-2.05:179:13Full Moon25Tue
26Wed4:419.98:2012.61:018.112:34-1.95:189:13Full Moon26Wed
27Thu5:179.58:5712.51:507.91:10-1.55:189:13Waning Gibbous27Thu
28Fri5:569.09:3312.42:407.61:45-1.05:199:13Waning Gibbous28Fri
29Sat6:418.310:0512.33:317.12:20-0.25:199:13Waning Gibbous29Sat
30Sun7:377.710:3412.14:216.42:570.95:209:12Waning Gibbous30Sun
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 3:09 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 transitional phase. Tonight's moon is 31% 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 shifting between spring and neap.

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 Third Quarter (31% illuminated). This places Union, WA in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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