Tides Today & Tomorrow in Alameda, CA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Alameda, CA.
Next low tide : in 3h 38m at 10:20 am (2.2 ft)
Next high tide : 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 - Apr 2099

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed9:036.210:445.73:182.53:55-0.66:537:32Waxing Gibbous1Wed
2Thu10:076.311:196.14:141.74:40-0.66:517:33Waxing Gibbous2Thu
3Fri11:086.411:536.55:050.95:22-0.36:507:34Full Moon3Fri
4Sat12:066.35:540.26:030.16:487:35Full Moon4Sat
5Sun12:276.81:036.16:42-0.46:430.76:477:36Full Moon5Sun
6Mon1:017.12:005.87:31-0.87:241.46:457:37Full Moon6Mon
7Tue1:367.12:595.58:19-0.98:072.06:447:37Waning Gibbous7Tue
8Wed2:137.04:015.29:10-0.98:542.66:427:38Waning Gibbous8Wed
9Thu2:536.85:095.010:04-0.69:503.16:417:39Waning Gibbous9Thu
10Fri3:396.46:224.911:04-0.311:013.36:397:40Third Quarter10Fri
11Sat4:355.97:334.912:120.06:387:41Third Quarter11Sat
12Sun5:455.48:345.112:233.41:200.26:377:42Third Quarter12Sun
13Mon7:035.29:225.21:413.12:210.36:357:43Third Quarter13Mon
14Tue8:165.110:015.42:452.63:120.36:347:44Waning Crescent14Tue
15Wed9:195.110:335.63:382.13:530.46:327:45Waning Crescent15Wed
16Thu10:135.211:015.84:231.64:290.66:317:46Waning Crescent16Thu
17Fri11:025.211:265.95:041.15:020.96:307:47Waning Crescent17Fri
18Sat11:495.211:496.15:410.75:321.26:287:48New Moon18Sat
19Sun12:345.16:150.36:021.66:277:48New Moon19Sun
20Mon12:126.21:195.16:480.06:312.06:267:49New Moon20Mon
21Tue12:356.42:065.07:20-0.27:012.46:247:50New Moon21Tue
22Wed1:006.52:544.97:53-0.47:352.86:237:51Waxing Crescent22Wed
23Thu1:316.63:474.88:31-0.58:123.16:227:52Waxing Crescent23Thu
24Fri2:076.54:474.79:15-0.58:593.46:207:53Waxing Crescent24Fri
25Sat2:516.45:514.710:07-0.510:013.56:197:54Waxing Crescent25Sat
26Sun3:456.16:564.811:09-0.411:243.56:187:55First Quarter26Sun
27Mon4:535.97:525.012:18-0.46:177:56First Quarter27Mon
28Tue6:135.68:405.312:513.11:23-0.36:167:57First Quarter28Tue
29Wed7:365.59:215.82:052.52:21-0.26:147:58Waxing Gibbous29Wed
30Thu8:535.59:586.23:071.73:130.06:137:59Waxing Gibbous30Thu
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 1:34 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