Tides Today & Tomorrow in Arcata Wharf, CA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently falling in Arcata Wharf, CA.
Next low tide : in 1h 40m at 1:20 am (1.2 ft)
Next high tide : 7:55 am (4.4 ft)
Sunset today : 8:09 pm
Sunrise tomorrow : 6:30 am
Moon phase : First Quarter (47% illuminated)
Tide Station Location : Station #9418851
Common Questions About Tides

Arcata Wharf, CA Tides - Jan 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun8:007.49:344.91:232.93:140.87:414:58Waxing Gibbous1Sun
2Mon8:507.810:365.32:263.14:050.07:414:59Waxing Gibbous2Mon
3Tue9:398.211:295.73:273.24:53-0.77:415:00Waxing Gibbous3Tue
4Wed10:298.54:243.15:39-1.27:415:01Full Moon4Wed
5Thu12:176.111:20 AM8.75:182.96:24-1.57:415:02Full Moon5Thu
6Fri1:036.412:108.76:122.77:09-1.67:415:03Full Moon6Fri
7Sat1:476.71:018.47:062.47:53-1.47:415:04Waning Gibbous7Sat
8Sun2:327.01:537.98:012.38:38-1.07:405:05Waning Gibbous8Sun
9Mon3:177.22:497.38:592.19:23-0.37:405:06Waning Gibbous9Mon
10Tue4:037.33:486.510:012.010:090.57:405:07Third Quarter10Tue
11Wed4:517.44:545.711:081.910:581.37:405:08Third Quarter11Wed
12Thu5:417.46:105.112:201.77:405:09Third Quarter12Thu
13Fri6:337.47:354.81:321.47:395:10Third Quarter13Fri
14Sat7:277.49:034.912:502.72:401.07:395:11Waning Crescent14Sat
15Sun8:207.410:175.11:543.13:370.67:395:12Waning Crescent15Sun
16Mon9:107.511:115.32:563.44:260.37:385:13Waning Crescent16Mon
17Tue9:577.511:545.63:523.45:080.17:385:15Waning Crescent17Tue
18Wed10:397.54:423.45:45-0.17:375:16New Moon18Wed
19Thu12:285.811:19 AM7.55:263.36:20-0.27:375:17New Moon19Thu
20Fri1:005.911:56 AM7.46:063.16:53-0.17:365:18New Moon20Fri
21Sat1:296.012:337.26:453.07:240.07:365:19New Moon21Sat
22Sun1:596.21:097.07:242.97:550.27:355:20Waxing Crescent22Sun
23Mon2:306.31:466.78:032.88:250.57:345:22Waxing Crescent23Mon
24Tue3:016.42:266.38:452.78:550.97:345:23Waxing Crescent24Tue
25Wed3:336.53:105.89:312.69:271.37:335:24Waxing Crescent25Wed
26Thu4:076.64:025.310:232.410:011.87:325:25First Quarter26Thu
27Fri4:466.85:084.911:242.210:422.47:315:26First Quarter27Fri
28Sat5:306.96:284.612:301.87:305:28First Quarter28Sat
29Sun6:227.17:554.61:391.37:305:29First Quarter29Sun
30Mon7:197.49:144.912:423.22:430.77:295:30Waxing Gibbous30Mon
31Tue8:207.710:175.31:573.33:400.07:285:31Waxing Gibbous31Tue
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 4:37 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 neap phase. Tonight's moon is 47% 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 minimum.

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 (47% illuminated). This places Arcata Wharf, CA in a neap tide cycle, so tidal ranges are near their weekly minimum 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