Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Sunday, August 9, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 1h 50m at 8:48 am (0.1 ft)
Next high tide : 2:42 pm (2.8 ft)
Sunset today : 8:07 pm
Sunrise tomorrow : 6:16 am
Moon phase : Waning Crescent (12% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Jan 1954

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri1:312.512:234.06:041.68:360.17:234:57Waning Crescent1Fri
2Sat2:202.612:534.16:541.79:170.07:234:58Waning Crescent2Sat
3Sun3:052.71:254.27:451.79:55-0.17:234:59New Moon3Sun
4Mon3:452.82:034.38:351.710:31-0.17:235:00New Moon4Mon
5Tue4:222.92:454.39:251.611:05-0.17:235:00New Moon5Tue
6Wed4:553.03:314.310:141.511:39-0.17:235:01New Moon6Wed
7Thu5:293.24:214.211:041.47:235:02Waxing Crescent7Thu
8Fri6:033.45:154.012:130.011:58 AM1.37:235:03Waxing Crescent8Fri
9Sat6:413.66:153.612:490.212:591.27:235:04Waxing Crescent9Sat
10Sun7:243.87:263.21:270.42:111.27:235:05First Quarter10Sun
11Mon8:124.08:532.92:100.63:321.17:235:06First Quarter11Mon
12Tue9:044.210:222.62:580.84:530.87:225:07First Quarter12Tue
13Wed10:004.311:432.63:521.16:070.57:225:08Waxing Gibbous13Wed
14Thu10:574.44:521.37:120.27:225:09Waxing Gibbous14Thu
15Fri12:532.711:51 AM4.45:551.58:090.07:225:10Waxing Gibbous15Fri
16Sat1:542.812:424.46:591.68:58-0.27:215:11Waxing Gibbous16Sat
17Sun2:473.01:304.48:001.79:43-0.37:215:12Full Moon17Sun
18Mon3:353.12:154.38:561.710:23-0.27:205:13Full Moon18Mon
19Tue4:193.23:004.29:481.611:00-0.17:205:14Full Moon19Tue
20Wed5:003.33:464.110:361.611:330.17:195:15Full Moon20Wed
21Thu5:373.44:333.911:231.57:195:17Waning Gibbous21Thu
22Fri6:133.55:243.712:030.312:111.57:185:18Waning Gibbous22Fri
23Sat6:473.66:193.412:310.51:021.47:185:19Waning Gibbous23Sat
24Sun7:213.77:213.112:580.72:001.47:175:20Waning Gibbous24Sun
25Mon7:573.78:332.81:260.93:061.37:165:21Third Quarter25Mon
26Tue8:363.89:502.62:021.24:161.27:165:22Third Quarter26Tue
27Wed9:183.811:042.62:451.45:241.07:155:23Third Quarter27Wed
28Thu10:053.83:371.66:250.87:145:24Third Quarter28Thu
29Fri12:102.710:54 AM3.94:351.77:180.67:145:25Waning Crescent29Fri
30Sat1:052.811:41 AM4.05:351.88:040.47:135:27Waning Crescent30Sat
31Sun1:522.912:264.16:351.88:460.37:125:28Waning Crescent31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9415316)

Common Questions About Rio Vista, CA Tides

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

Slack tide in Rio Vista, CA is approximately 11:45 am — 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 Rio Vista, CA?

Rio Vista, CA is currently in a spring phase. Tonight's moon is 12% 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 Rio Vista, 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 Rio Vista, CA?

Tide predictions for Rio Vista, 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 Rio Vista, CA?

Tide data for Rio Vista, CA is sourced from NOAA Station #9415316. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9415316.

What is the moon phase in Rio Vista, CA tonight?

Tonight the moon over Rio Vista, CA is Waning Crescent (12% illuminated). This places Rio Vista, 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