Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 2h 27m at 10:23 am (-0.2 ft)
Next high tide : 4:18 pm (3.2 ft)
Sunset today : 8:05 pm
Sunrise tomorrow : 6:18 am
Moon phase : New Moon (1% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Jan 1951

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon9:123.79:532.62:500.74:431.17:234:57Third Quarter1Mon
2Tue9:574.011:222.53:351.05:590.87:234:58Third Quarter2Tue
3Wed10:464.24:231.27:080.47:234:58Waning Crescent3Wed
4Thu12:382.411:36 AM4.45:161.48:090.07:234:59Waning Crescent4Thu
5Fri1:452.512:274.56:171.69:03-0.37:235:00Waning Crescent5Fri
6Sat2:452.61:184.67:261.79:53-0.47:235:01New Moon6Sat
7Sun3:402.72:094.68:361.810:39-0.57:235:02New Moon7Sun
8Mon4:322.93:014.49:401.711:21-0.57:235:03New Moon8Mon
9Tue5:203.13:544.210:401.77:235:04Waxing Crescent9Tue
10Wed6:043.34:504.012:02-0.311:37 AM1.67:235:05Waxing Crescent10Wed
11Thu6:473.55:493.712:41-0.112:351.67:235:06Waxing Crescent11Thu
12Fri7:283.66:543.31:190.11:371.57:225:07Waxing Crescent12Fri
13Sat8:113.88:063.01:560.42:451.47:225:08First Quarter13Sat
14Sun8:543.99:232.82:350.73:571.27:225:09First Quarter14Sun
15Mon9:394.010:412.63:151.05:091.07:225:10First Quarter15Mon
16Tue10:244.111:532.63:591.26:160.77:215:11First Quarter16Tue
17Wed11:084.24:461.57:140.47:215:12Waxing Gibbous17Wed
18Thu12:562.711:51 AM4.25:371.68:040.17:205:13Waxing Gibbous18Thu
19Fri1:522.812:314.26:301.88:480.07:205:14Waxing Gibbous19Fri
20Sat2:412.91:094.27:231.89:270.07:205:15Waxing Gibbous20Sat
21Sun3:243.01:454.28:131.810:020.07:195:16Full Moon21Sun
22Mon4:033.02:214.29:011.810:330.17:185:17Full Moon22Mon
23Tue4:373.12:584.29:451.711:020.27:185:18Full Moon23Tue
24Wed5:063.13:384.210:271.611:270.37:175:20Full Moon24Wed
25Thu5:303.24:214.111:091.511:520.37:175:21Waning Gibbous25Thu
26Fri5:523.45:083.911:531.47:165:22Waning Gibbous26Fri
27Sat6:153.65:593.712:190.512:421.37:155:23Waning Gibbous27Sat
28Sun6:463.87:003.312:490.61:441.37:155:24Waning Gibbous28Sun
29Mon7:244.08:182.91:250.83:021.27:145:25Third Quarter29Mon
30Tue8:124.19:512.72:081.14:261.07:135:26Third Quarter30Tue
31Wed9:074.211:192.62:581.35:450.77:125:27Third Quarter31Wed
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 1:20 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 Rio Vista, CA?

Rio Vista, CA is currently in a spring phase. Tonight's moon is 1% 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 New Moon (1% 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