Tides Today & Tomorrow in Eureka, CA

TIDE TIMES for Sunday, August 9, 2026
The tide is currently falling in Eureka, CA.
Next low tide : in 35m at 3:19 pm (3.5 ft)
Next high tide : 9:46 pm (8.2 ft)
Sunset today : 8:22 pm
Sunrise tomorrow : 6:21 am
Moon phase : Waning Crescent (12% illuminated)
Tide Station Location : Station #9418801
Common Questions About Tides

Eureka, CA Tides - Jan 2093

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu3:237.02:307.78:262.99:03-0.77:405:00Waxing Crescent1Thu
2Fri4:127.03:286.99:302.99:510.17:405:01First Quarter2Fri
3Sat5:027.14:326.110:392.710:400.97:405:02First Quarter3Sat
4Sun5:517.25:455.411:532.411:321.67:405:03First Quarter4Sun
5Mon6:397.37:065.01:052.07:405:04First Quarter5Mon
6Tue7:257.48:305.012:262.32:081.57:405:05Waxing Gibbous6Tue
7Wed8:097.59:445.11:212.83:010.97:405:06Waxing Gibbous7Wed
8Thu8:517.610:435.42:153.23:460.57:405:07Waxing Gibbous8Thu
9Fri9:317.811:295.63:063.44:260.17:405:08Waxing Gibbous9Fri
10Sat10:107.83:523.65:03-0.27:395:09Full Moon10Sat
11Sun12:075.810:47 AM7.94:343.65:38-0.47:395:10Full Moon11Sun
12Mon12:416.011:23 AM7.95:143.56:12-0.57:395:11Full Moon12Mon
13Tue1:156.111:59 AM7.85:523.56:46-0.57:385:12Full Moon13Tue
14Wed1:496.212:357.76:313.47:19-0.47:385:13Waning Gibbous14Wed
15Thu2:236.31:127.47:113.47:53-0.27:375:14Waning Gibbous15Thu
16Fri2:586.41:517.17:553.38:270.17:375:15Waning Gibbous16Fri
17Sat3:346.52:366.68:443.19:030.57:375:16Waning Gibbous17Sat
18Sun4:116.73:316.19:412.99:431.07:365:18Third Quarter18Sun
19Mon4:516.94:395.510:462.610:271.67:355:19Third Quarter19Mon
20Tue5:357.26:025.111:572.011:202.27:355:20Third Quarter20Tue
21Wed6:247.57:315.01:071.37:345:21Third Quarter21Wed
22Thu7:177.98:545.212:232.82:120.57:335:22Waning Crescent22Thu
23Fri8:128.310:055.61:303.13:10-0.37:335:23Waning Crescent23Fri
24Sat9:078.711:036.12:373.24:03-1.07:325:25Waning Crescent24Sat
25Sun10:029.011:536.43:383.14:52-1.47:315:26New Moon25Sun
26Mon10:549.14:352.95:39-1.77:305:27New Moon26Mon
27Tue12:396.811:46 AM9.05:292.66:24-1.67:305:28New Moon27Tue
28Wed1:227.012:368.76:212.47:08-1.37:295:30Waxing Crescent28Wed
29Thu2:047.11:268.27:142.27:50-0.87:285:31Waxing Crescent29Thu
30Fri2:467.22:177.58:082.18:32-0.27:275:32Waxing Crescent30Fri
31Sat3:287.33:106.79:042.19:140.67:265:33Waxing Crescent31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9418801)

Common Questions About Eureka, CA Tides

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

Slack tide in Eureka, CA is approximately 6:32 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 Eureka, CA?

Eureka, CA is currently in a spring phase. Tonight's moon is 12% 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 Eureka, 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 Eureka, CA?

Tide predictions for Eureka, 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 Eureka, CA?

Tide data for Eureka, CA is sourced from NOAA Station #9418801. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9418801.

What is the moon phase in Eureka, CA tonight?

Tonight the moon over Eureka, CA is Waning Crescent (12% illuminated). This places Eureka, CA 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