Tides Today & Tomorrow in Alameda, CA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Alameda, CA.
Next low tide : 11:50 pm (1.2 ft)
Next high tide : in 6h 13m at 4:48 pm (6.4 ft)
Sunset today : 7:58 pm
Sunrise tomorrow : 6:27 am
Moon phase : First Quarter (37% illuminated)
Tide Station Location : Station #9414750
Common Questions About Tides

Alameda, CA Tides - Sep 2099

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue1:166.12:035.97:330.77:531.76:397:38Full Moon1Tue
2Wed1:555.82:246.07:581.18:271.56:407:36Waning Gibbous2Wed
3Thu2:365.42:466.28:241.69:041.46:417:35Waning Gibbous3Thu
4Fri3:235.13:116.28:522.19:451.36:427:33Waning Gibbous4Fri
5Sat4:204.73:446.39:252.610:371.26:437:32Waning Gibbous5Sat
6Sun5:374.44:266.210:073.211:421.26:447:30Third Quarter6Sun
7Mon7:104.45:216.211:093.66:457:29Third Quarter7Mon
8Tue8:354.66:296.312:590.912:383.86:457:27Third Quarter8Tue
9Wed9:364.97:426.42:120.62:003.76:467:26Waning Crescent9Wed
10Thu10:225.28:496.73:130.13:053.36:477:24Waning Crescent10Thu
11Fri11:005.59:517.04:04-0.34:002.86:487:22Waning Crescent11Fri
12Sat11:365.810:487.24:49-0.64:502.26:497:21Waning Crescent12Sat
13Sun12:106.15:31-0.65:391.56:507:19New Moon13Sun
14Mon12:436.56:11-0.46:280.96:507:18New Moon14Mon
15Tue12:387.01:176.86:500.07:180.46:517:16New Moon15Tue
16Wed1:346.71:527.17:290.68:090.06:527:15Waxing Crescent16Wed
17Thu2:336.22:297.28:101.39:03-0.16:537:13Waxing Crescent17Thu
18Fri3:365.73:097.28:532.010:02-0.16:547:12Waxing Crescent18Fri
19Sat4:465.33:557.09:442.711:070.06:557:10First Quarter19Sat
20Sun6:055.14:506.710:483.26:557:08First Quarter20Sun
21Mon7:275.15:576.312:200.212:083.56:567:07First Quarter21Mon
22Tue8:405.27:126.11:350.31:313.46:577:05First Quarter22Tue
23Wed9:365.58:236.12:410.22:413.16:587:04Waxing Gibbous23Wed
24Thu10:215.79:256.13:360.23:382.76:597:02Waxing Gibbous24Thu
25Fri10:585.810:176.14:200.24:262.27:007:01Waxing Gibbous25Fri
26Sat11:305.911:046.14:570.35:081.87:016:59Waxing Gibbous26Sat
27Sun11:586.011:476.05:300.55:461.57:016:58Full Moon27Sun
28Mon12:236.05:590.86:221.27:026:56Full Moon28Mon
29Tue12:295.812:456.16:261.16:551.07:036:54Full Moon29Tue
30Wed1:105.61:056.26:531.67:270.87:046:53Full Moon30Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9414750)

Common Questions About Alameda, CA Tides

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

Slack tide in Alameda, CA is approximately 8:19 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 Alameda, CA?

Alameda, CA is currently in a transitional phase. Tonight's moon is 37% 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 shifting between spring and neap.

What datum are Alameda, 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 Alameda, CA?

Tide predictions for Alameda, 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 Alameda, CA?

Tide data for Alameda, CA is sourced from NOAA Station #9414750. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9414750.

What is the moon phase in Alameda, CA tonight?

Tonight the moon over Alameda, CA is First Quarter (37% illuminated). This places Alameda, CA in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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