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 3h 39m 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 - Mar 1954

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon1:103.112:063.86:231.78:030.56:385:59Waning Crescent1Mon
2Tue1:453.21:013.97:221.58:430.56:376:00Waning Crescent2Tue
3Wed2:173.31:534.08:181.29:210.66:356:01New Moon3Wed
4Thu2:463.52:443.99:111.09:560.66:346:02New Moon4Thu
5Fri3:173.73:363.810:030.810:320.76:336:03New Moon5Fri
6Sat3:503.94:313.710:560.611:070.86:316:04Waxing Crescent6Sat
7Sun4:284.25:313.411:520.511:441.06:306:05Waxing Crescent7Sun
8Mon5:094.36:373.212:510.46:286:06Waxing Crescent8Mon
9Tue5:554.37:483.012:261.11:560.46:276:07Waxing Crescent9Tue
10Wed6:464.29:032.91:151.33:050.46:256:08First Quarter10Wed
11Thu7:454.110:173.02:151.54:150.46:246:09First Quarter11Thu
12Fri8:563.911:223.13:261.65:200.36:226:10First Quarter12Fri
13Sat10:143.74:401.66:180.36:216:11Waxing Gibbous13Sat
14Sun12:183.311:27 AM3.65:501.57:080.26:196:12Waxing Gibbous14Sun
15Mon1:053.512:283.66:531.37:540.36:186:13Waxing Gibbous15Mon
16Tue1:463.61:213.67:501.18:340.46:166:14Waxing Gibbous16Tue
17Wed2:223.72:093.68:411.09:090.66:156:15Full Moon17Wed
18Thu2:553.82:563.59:280.89:410.76:136:16Full Moon18Thu
19Fri3:243.83:423.410:120.710:090.96:116:17Full Moon19Fri
20Sat3:503.84:293.310:540.610:341.16:106:18Full Moon20Sat
21Sun4:123.85:183.111:360.510:591.26:086:19Waning Gibbous21Sun
22Mon4:323.96:103.012:180.56:076:20Waning Gibbous22Mon
23Tue4:563.97:042.91:020.56:056:21Waning Gibbous23Tue
24Wed5:273.98:022.912:041.41:500.56:046:22Waning Gibbous24Wed
25Thu6:053.89:032.812:481.62:450.66:026:22Third Quarter25Thu
26Fri6:523.710:022.91:411.73:430.66:016:23Third Quarter26Fri
27Sat7:483.510:563.02:441.74:410.65:596:24Third Quarter27Sat
28Sun9:003.411:423.13:541.75:350.65:586:25Third Quarter28Sun
29Mon10:283.35:041.66:250.65:566:26Waning Crescent29Mon
30Tue12:203.211:46 AM3.46:101.37:100.65:556:27Waning Crescent30Tue
31Wed12:543.412:503.47:121.07:530.75:536:28Waning Crescent31Wed
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