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 4h 39m 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 - Dec 1973

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat4:495.33:315.010:213.010:130.67:064:50First Quarter1Sat
2Sun5:305.54:424.611:282.611:031.07:064:50First Quarter2Sun
3Mon6:105.86:064.412:322.17:074:50First Quarter3Mon
4Tue6:496.17:294.41:301.47:084:50First Quarter4Tue
5Wed7:286.58:434.612:501.82:210.77:094:50Waxing Gibbous5Wed
6Thu8:076.99:474.91:432.23:090.07:104:50Waxing Gibbous6Thu
7Fri8:497.210:455.22:352.53:55-0.77:114:50Waxing Gibbous7Fri
8Sat9:327.611:395.43:272.74:42-1.27:124:50Full Moon8Sat
9Sun10:197.84:182.95:28-1.67:134:50Full Moon9Sun
10Mon12:305.611:08 AM7.85:112.96:16-1.77:134:50Full Moon10Mon
11Tue1:195.811:58 AM7.76:052.87:03-1.77:144:50Waning Gibbous11Tue
12Wed2:075.912:527.47:022.77:51-1.47:154:50Waning Gibbous12Wed
13Thu2:545.91:486.98:032.58:40-1.07:164:51Waning Gibbous13Thu
14Fri3:436.12:496.29:092.39:30-0.47:164:51Waning Gibbous14Fri
15Sat4:326.23:595.510:222.110:220.37:174:51Third Quarter15Sat
16Sun5:216.45:194.911:361.611:171.07:184:51Third Quarter16Sun
17Mon6:116.66:444.612:481.17:184:52Third Quarter17Mon
18Tue6:596.78:054.612:151.61:530.57:194:52Waning Crescent18Tue
19Wed7:446.99:164.81:132.22:500.07:194:53Waning Crescent19Wed
20Thu8:276.910:165.12:092.63:38-0.37:204:53Waning Crescent20Thu
21Fri9:086.911:065.33:022.94:22-0.67:214:53Waning Crescent21Fri
22Sat9:466.911:515.43:503.05:01-0.77:214:54New Moon22Sat
23Sun10:236.84:353.15:36-0.77:214:54New Moon23Sun
24Mon12:305.510:59 AM6.75:173.16:09-0.77:224:55New Moon24Mon
25Tue1:075.511:34 AM6.65:573.16:40-0.67:224:56New Moon25Tue
26Wed1:415.512:106.46:363.07:10-0.57:234:56Waxing Crescent26Wed
27Thu2:135.512:466.27:142.97:39-0.37:234:57Waxing Crescent27Thu
28Fri2:445.51:255.97:542.88:10-0.17:234:58Waxing Crescent28Fri
29Sat3:145.62:095.58:392.78:420.37:244:58Waxing Crescent29Sat
30Sun3:465.73:005.09:322.59:190.77:244:59First Quarter30Sun
31Mon4:225.94:064.510:332.210:031.47:245:00First Quarter31Mon
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