Tides Today & Tomorrow in Union, WA

TIDE TIMES for Thursday, July 16, 2026
The tide is currently rising in Union, WA.
Next low tide (tomorrow) : 1:53 am (5.8 ft)
Next high tide : in 3h 35m at 8:08 pm (13.3 ft)
Sunset today : 9:04 pm
Sunrise tomorrow : 5:32 am
Moon phase : Waxing Crescent (8% illuminated)
Tide Station Location : Station #9445478
Common Questions About Tides

Union, WA Tides - Jun 1980

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun5:3910.08:4712.61:357.11:12-1.65:199:01Waning Gibbous1Sun
2Mon6:159.69:3112.62:287.21:52-1.35:189:02Waning Gibbous2Mon
3Tue6:599.010:1712.53:247.02:35-0.75:189:03Waning Gibbous3Tue
4Wed7:558.311:0212.44:236.63:230.15:179:03Third Quarter4Wed
5Thu9:127.611:4612.35:235.74:181.15:179:04Third Quarter5Thu
6Fri11:117.26:214.55:212.35:169:05Third Quarter6Fri
7Sat12:3012.21:077.67:143.06:293.55:169:06Third Quarter7Sat
8Sun1:1212.22:318.68:031.47:384.55:169:06Waning Crescent8Sun
9Mon1:5212.13:399.98:50-0.18:435.45:159:07Waning Crescent9Mon
10Tue2:3212.14:3911.09:36-1.49:456.15:159:08Waning Crescent10Tue
11Wed3:1211.95:3212.010:21-2.410:436.55:159:08New Moon11Wed
12Thu3:5311.76:2212.611:05-3.011:396.85:159:09New Moon12Thu
13Fri4:3311.47:1013.011:48-3.25:159:09New Moon13Fri
14Sat5:1310.97:5613.112:326.912:30-2.95:149:10Waxing Crescent14Sat
15Sun5:5310.38:4113.01:256.91:13-2.25:149:10Waxing Crescent15Sun
16Mon6:349.59:2612.82:206.81:55-1.35:149:11Waxing Crescent16Mon
17Tue7:198.710:0912.53:166.52:37-0.25:159:11Waxing Crescent17Tue
18Wed8:157.910:5112.24:146.13:211.05:159:12First Quarter18Wed
19Thu9:387.111:3211.85:125.54:072.25:159:12First Quarter19Thu
20Fri11:256.86:074.64:583.45:159:12First Quarter20Fri
21Sat12:1111.612:597.16:583.75:574.65:159:12First Quarter21Sat
22Sun12:4711.32:167.87:432.66:595.55:159:12Waxing Gibbous22Sun
23Mon1:2211.23:188.78:241.68:016.25:169:13Waxing Gibbous23Mon
24Tue1:5411.14:129.79:040.59:006.75:169:13Waxing Gibbous24Tue
25Wed2:2511.04:5810.69:42-0.49:567.05:169:13Waxing Gibbous25Wed
26Thu2:5610.95:4111.410:20-1.210:497.15:179:13Full Moon26Thu
27Fri3:2910.86:2112.110:58-1.811:387.25:179:13Full Moon27Fri
28Sat4:0410.67:0212.511:36-2.25:189:13Full Moon28Sat
29Sun4:4210.47:4212.812:277.112:14-2.45:189:12Full Moon29Sun
30Mon5:2410.18:2312.91:157.012:53-2.35:199:12Waning Gibbous30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9445478)

Common Questions About Union, WA Tides

Show All
What time does the tide turn (slack tide) in Union, WA today?

Slack tide in Union, WA is approximately 11:00 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 8% 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 Waxing Crescent (8% 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