Tides Today & Tomorrow in Eureka, CA

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently rising in Eureka, CA.
Next low tide : 5:24 pm (2.6 ft)
Next high tide : in 6h 42m at 12:42 pm (6.0 ft)
Sunset today : 8:20 pm
Sunrise tomorrow : 6:23 am
Moon phase : New Moon (1% illuminated)
Tide Station Location : Station #9418801
Common Questions About Tides

Eureka, CA Tides - Mar 2096

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu4:447.76:355.011:400.311:003.36:486:09First Quarter1Thu
2Fri5:447.68:125.012:550.26:466:10First Quarter2Fri
3Sat6:537.49:305.312:193.72:050.06:456:11Waxing Gibbous3Sat
4Sun8:037.410:255.71:423.73:06-0.36:436:12Waxing Gibbous4Sun
5Mon9:077.411:066.02:533.43:57-0.46:416:13Waxing Gibbous5Mon
6Tue10:037.511:406.23:512.94:41-0.56:406:14Waxing Gibbous6Tue
7Wed10:527.44:392.55:18-0.46:386:15Full Moon7Wed
8Thu12:116.411:36 AM7.35:222.05:53-0.26:376:16Full Moon8Thu
9Fri12:386.612:177.16:031.76:240.26:356:17Full Moon9Fri
10Sat1:056.712:566.76:411.46:540.76:336:19Full Moon10Sat
11Sun1:306.82:376.38:201.28:231.27:327:20Waning Gibbous11Sun
12Mon2:566.83:195.98:591.18:501.87:307:21Waning Gibbous12Mon
13Tue3:236.84:055.49:401.19:182.47:287:22Waning Gibbous13Tue
14Wed3:516.74:595.010:261.19:472.97:277:23Waning Gibbous14Wed
15Thu4:246.66:064.711:181.110:203.47:257:24Third Quarter15Thu
16Fri5:056.57:284.512:201.17:247:25Third Quarter16Fri
17Sat6:016.48:594.61:301.07:227:26Third Quarter17Sat
18Sun7:116.410:064.912:384.02:360.77:207:27Third Quarter18Sun
19Mon8:236.510:505.22:103.93:330.27:197:28Waning Crescent19Mon
20Tue9:296.811:255.63:203.54:21-0.27:177:29Waning Crescent20Tue
21Wed10:277.111:576.14:162.95:04-0.57:157:30Waning Crescent21Wed
22Thu11:217.45:062.15:44-0.67:147:32New Moon22Thu
23Fri12:296.612:127.55:541.36:22-0.57:127:33New Moon23Fri
24Sat1:017.11:047.46:410.67:00-0.17:107:34New Moon24Sat
25Sun1:357.51:577.17:29-0.17:380.47:097:35New Moon25Sun
26Mon2:107.82:516.78:19-0.58:181.17:077:36Waxing Crescent26Mon
27Tue2:478.03:506.29:11-0.79:001.87:057:37Waxing Crescent27Tue
28Wed3:298.04:565.710:06-0.79:472.57:047:38Waxing Crescent28Wed
29Thu4:167.76:105.311:07-0.510:433.17:027:39First Quarter29Thu
30Fri5:127.37:355.112:15-0.37:007:40First Quarter30Fri
31Sat6:196.98:585.21:28-0.16:597:41First Quarter31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9418801)

Common Questions About Eureka, CA Tides

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

Slack tide in Eureka, CA is approximately 3:03 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 1% 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 New Moon (1% 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