Tides Today & Tomorrow in Arcata Wharf, CA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Arcata Wharf, CA.
Next low tide (tomorrow) : in 4h 58m at 1:20 am (1.2 ft)
Next high tide (tomorrow) : 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 - Apr 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:596.710:476.73:571.44:230.06:006:40Waxing Gibbous1Sat
2Sun10:576.811:277.14:510.75:090.25:586:41Full Moon2Sun
3Mon11:526.85:420.05:530.45:576:42Full Moon3Mon
4Tue12:067.412:446.66:29-0.46:350.85:556:43Full Moon4Tue
5Wed12:457.61:346.47:16-0.77:171.35:546:44Full Moon5Wed
6Thu1:237.52:246.18:02-0.77:581.75:526:45Waning Gibbous6Thu
7Fri2:037.33:155.78:48-0.58:422.25:506:46Waning Gibbous7Fri
8Sat2:436.94:095.39:37-0.29:282.75:496:47Waning Gibbous8Sat
9Sun3:286.55:085.110:280.210:223.05:476:48Third Quarter9Sun
10Mon4:186.16:124.911:240.611:273.25:456:49Third Quarter10Mon
11Tue5:175.77:174.912:240.95:446:50Third Quarter11Tue
12Wed6:235.48:155.012:413.21:251.05:426:51Third Quarter12Wed
13Thu7:325.39:025.31:542.92:211.15:416:53Waning Crescent13Thu
14Fri8:365.39:395.62:552.53:101.15:396:54Waning Crescent14Fri
15Sat9:335.410:135.93:452.03:521.25:386:55Waning Crescent15Sat
16Sun10:245.510:456.24:271.44:301.25:366:56Waning Crescent16Sun
17Mon11:105.611:166.55:070.95:051.45:356:57New Moon17Mon
18Tue11:555.711:476.85:440.45:401.55:336:58New Moon18Tue
19Wed12:385.86:22-0.16:151.75:326:59New Moon19Wed
20Thu12:187.01:235.77:00-0.46:501.95:307:00New Moon20Thu
21Fri12:517.12:085.67:40-0.77:282.25:297:01Waxing Crescent21Fri
22Sat1:277.12:575.58:24-0.88:092.45:277:02Waxing Crescent22Sat
23Sun2:077.13:515.39:11-0.78:572.75:267:03Waxing Crescent23Sun
24Mon2:546.94:495.210:02-0.69:552.85:247:04Waxing Crescent24Mon
25Tue3:506.55:505.310:59-0.411:052.95:237:05First Quarter25Tue
26Wed4:576.26:525.512:00-0.15:217:06First Quarter26Wed
27Thu6:135.97:495.812:252.61:030.15:207:07First Quarter27Thu
28Fri7:315.78:416.21:422.12:030.35:197:08Waxing Gibbous28Fri
29Sat8:465.79:286.72:511.42:590.65:177:09Waxing Gibbous29Sat
30Sun9:535.710:117.13:500.63:500.85:167:10Waxing Gibbous30Sun
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