Tides Today & Tomorrow in Arcata Wharf, CA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently rising in Arcata Wharf, CA.
Next low tide : 12:23 pm (3.6 ft)
Next high tide : in 4h 43m at 7:55 am (4.4 ft)
Sunset today : 8:07 pm
Sunrise tomorrow : 6:31 am
Moon phase : First Quarter (56% illuminated)
Tide Station Location : Station #9418851
Common Questions About Tides

Arcata Wharf, CA Tides - Sep 1938

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu6:004.85:256.411:083.25:426:50First Quarter1Thu
2Fri7:214.76:266.212:401.112:163.55:436:48First Quarter2Fri
3Sat8:384.87:296.21:471.11:303.55:446:46Waxing Gibbous3Sat
4Sun9:355.08:296.22:461.02:373.45:456:45Waxing Gibbous4Sun
5Mon10:165.39:236.43:360.83:323.05:466:43Waxing Gibbous5Mon
6Tue10:495.510:106.54:170.74:182.65:476:41Waxing Gibbous6Tue
7Wed11:195.810:536.64:530.64:592.25:486:40Waxing Gibbous7Wed
8Thu11:476.111:356.65:270.55:371.85:496:38Full Moon8Thu
9Fri12:166.45:580.66:151.45:506:36Full Moon9Fri
10Sat12:156.612:446.66:290.86:531.15:516:35Full Moon10Sat
11Sun12:566.41:136.87:011.17:320.85:526:33Waning Gibbous11Sun
12Mon1:406.21:447.07:331.58:140.65:536:31Waning Gibbous12Mon
13Tue2:265.92:187.18:071.99:010.55:546:30Waning Gibbous13Tue
14Wed3:195.62:577.18:452.39:540.45:556:28Waning Gibbous14Wed
15Thu4:195.23:447.09:292.810:540.45:566:26Third Quarter15Thu
16Fri5:295.04:436.910:273.15:576:25Third Quarter16Fri
17Sat6:465.05:546.812:010.411:42 AM3.35:586:23Third Quarter17Sat
18Sun7:595.27:096.81:110.31:063.25:596:21Third Quarter18Sun
19Mon9:005.68:226.92:160.22:232.86:006:20Waning Crescent19Mon
20Tue9:496.19:287.03:140.03:282.16:016:18Waning Crescent20Tue
21Wed10:326.510:277.14:050.04:241.46:026:16Waning Crescent21Wed
22Thu11:127.011:227.14:510.15:160.76:036:14New Moon22Thu
23Fri11:507.35:330.36:030.26:046:13New Moon23Fri
24Sat12:136.912:267.56:140.76:49-0.16:056:11New Moon24Sat
25Sun1:036.71:037.56:541.27:34-0.26:066:09Waxing Crescent25Sun
26Mon1:526.41:397.47:331.78:19-0.16:076:08Waxing Crescent26Mon
27Tue2:416.02:167.28:132.29:050.16:086:06Waxing Crescent27Tue
28Wed3:335.62:566.88:552.89:540.46:096:04Waxing Crescent28Wed
29Thu4:305.33:406.49:413.210:480.86:106:03First Quarter29Thu
30Fri5:335.04:336.110:373.511:481.06:116:01First Quarter30Fri
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 10:09 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 Arcata Wharf, CA?

Arcata Wharf, CA is currently in a neap phase. Tonight's moon is 56% 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 (56% 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