Tides Today & Tomorrow in Arcata Wharf, CA

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Arcata Wharf, CA.
Next low tide : in 47m at 2:29 am (1.1 ft)
Next high tide : 9:39 am (4.4 ft)
Sunset today : 8:06 pm
Sunrise tomorrow : 6:32 am
Moon phase : First Quarter (66% illuminated)
Tide Station Location : Station #9418851
Common Questions About Tides

Arcata Wharf, CA Tides - May 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri8:584.99:316.03:131.83:031.45:147:12Waxing Gibbous1Fri
2Sat9:574.910:026.34:001.23:451.75:137:13Waxing Gibbous2Sat
3Sun10:505.010:326.54:410.74:231.95:117:14Waxing Gibbous3Sun
4Mon11:365.111:026.75:190.24:592.25:107:15Full Moon4Mon
5Tue12:195.25:55-0.25:332.55:097:16Full Moon5Tue
6Wed1:015.26:30-0.56:072.75:087:17Full Moon6Wed
7Thu12:026.91:425.27:05-0.76:412.95:067:18Full Moon7Thu
8Fri12:346.92:255.27:42-0.77:163.05:057:19Waning Gibbous8Fri
9Sat1:076.83:095.18:21-0.87:553.25:047:20Waning Gibbous9Sat
10Sun1:446.73:575.09:03-0.78:393.25:037:21Waning Gibbous10Sun
11Mon2:266.54:465.09:48-0.59:343.35:027:22Waning Gibbous11Mon
12Tue3:166.25:375.110:36-0.310:423.25:017:23Third Quarter12Tue
13Wed4:195.86:275.411:280.05:007:24Third Quarter13Wed
14Thu5:345.47:145.812:002.812:230.34:597:25Third Quarter14Thu
15Fri6:555.27:596.31:162.21:180.74:587:26Third Quarter15Fri
16Sat8:155.18:436.82:251.32:131.14:577:27Waning Crescent16Sat
17Sun9:305.29:277.33:250.33:071.44:567:28Waning Crescent17Sun
18Mon10:385.310:117.84:19-0.63:591.84:557:29Waning Crescent18Mon
19Tue11:395.510:558.05:10-1.34:492.14:547:30New Moon19Tue
20Wed12:365.75:59-1.85:392.34:547:31New Moon20Wed
21Thu1:295.76:47-2.06:292.54:537:32New Moon21Thu
22Fri12:278.02:215.77:35-2.07:202.64:527:33Waxing Crescent22Fri
23Sat1:157.73:125.78:22-1.78:132.84:517:34Waxing Crescent23Sat
24Sun2:037.24:025.69:10-1.39:092.94:517:35Waxing Crescent24Sun
25Mon2:556.64:535.69:58-0.710:122.94:507:36Waxing Crescent25Mon
26Tue3:495.95:425.610:46-0.111:202.84:497:36First Quarter26Tue
27Wed4:505.36:305.711:350.54:497:37First Quarter27Wed
28Thu5:584.87:145.812:332.512:241.04:487:38First Quarter28Thu
29Fri7:124.47:546.01:422.11:131.64:487:39First Quarter29Fri
30Sat8:264.38:326.32:421.52:022.04:477:40Waxing Gibbous30Sat
31Sun9:364.49:086.53:320.92:492.44:477:40Waxing Gibbous31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9418851)

Common Questions About Arcata Wharf, CA Tides

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What time does the tide turn (slack tide) in Arcata Wharf, CA today?

Slack tide in Arcata Wharf, CA is approximately 6:04 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 Arcata Wharf, CA?

Arcata Wharf, CA is currently in a transitional phase. Tonight's moon is 66% 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 Arcata Wharf, CA 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 Arcata Wharf, CA?

Tide predictions for Arcata Wharf, CA 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 Arcata Wharf, CA?

Tide data for Arcata Wharf, CA is sourced from NOAA Station #9418851. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9418851.

What is the moon phase in Arcata Wharf, CA tonight?

Tonight the moon over Arcata Wharf, CA is First Quarter (66% illuminated). This places Arcata Wharf, CA 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