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 53m 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 - Nov 2099

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun2:325.012:456.66:563.47:52-0.26:355:10Waning Gibbous1Sun
2Mon3:264.91:276.47:403.68:40-0.26:365:09Waning Gibbous2Mon
3Tue4:264.92:186.28:373.79:37-0.16:375:08Waning Gibbous3Tue
4Wed5:274.93:215.99:543.710:420.06:385:07Third Quarter4Wed
5Thu6:225.14:385.611:203.411:470.16:395:06Third Quarter5Thu
6Fri7:095.46:025.512:362.86:405:05Third Quarter6Fri
7Sat7:505.97:225.512:470.21:392.06:415:04Waning Crescent7Sat
8Sun8:276.38:345.61:400.42:351.16:425:03Waning Crescent8Sun
9Mon9:036.89:415.62:280.73:270.26:435:02Waning Crescent9Mon
10Tue9:397.210:435.73:141.24:16-0.56:445:01Waning Crescent10Tue
11Wed10:157.511:435.83:591.75:04-1.16:455:00New Moon11Wed
12Thu10:537.74:452.25:52-1.46:464:59New Moon12Thu
13Fri12:415.811:33 AM7.65:322.76:39-1.56:474:59New Moon13Fri
14Sat1:385.712:157.46:223.07:28-1.36:484:58Waxing Crescent14Sat
15Sun2:355.61:007.17:163.38:18-1.06:494:57Waxing Crescent15Sun
16Mon3:325.51:496.68:153.49:10-0.66:504:56Waxing Crescent16Mon
17Tue4:295.42:456.09:223.410:05-0.26:524:56First Quarter17Tue
18Wed5:245.43:495.510:353.311:020.26:534:55First Quarter18Wed
19Thu6:165.55:035.011:482.911:570.66:544:55First Quarter19Thu
20Fri7:025.66:214.712:542.46:554:54First Quarter20Fri
21Sat7:415.87:344.612:480.91:521.86:564:53Waxing Gibbous21Sat
22Sun8:146.08:404.71:341.32:411.36:574:53Waxing Gibbous22Sun
23Mon8:446.39:384.82:151.73:240.76:584:53Waxing Gibbous23Mon
24Tue9:126.410:324.92:552.14:030.36:594:52Waxing Gibbous24Tue
25Wed9:396.611:225.03:332.54:39-0.17:004:52Waxing Gibbous25Wed
26Thu10:066.74:102.85:14-0.47:014:51Full Moon26Thu
27Fri12:105.110:36 AM6.84:473.15:48-0.67:024:51Full Moon27Fri
28Sat12:555.211:10 AM6.95:253.46:23-0.77:034:51Full Moon28Sat
29Sun1:405.211:47 AM6.96:043.57:00-0.87:044:50Waning Gibbous29Sun
30Mon2:255.212:286.86:473.67:41-0.87:054:50Waning Gibbous30Mon
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