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 6h 49m 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 - Jun 1954

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue3:094.55:532.611:44-0.810:461.75:458:23New Moon1Tue
2Wed3:554.46:502.812:31-0.85:448:24New Moon2Wed
3Thu4:424.27:413.01:15-0.75:448:24Waxing Crescent3Thu
4Fri5:333.98:273.212:421.71:57-0.65:448:25Waxing Crescent4Fri
5Sat6:283.69:113.41:401.72:38-0.45:448:26Waxing Crescent5Sat
6Sun7:293.39:543.62:421.63:19-0.25:438:26First Quarter6Sun
7Mon8:402.910:383.73:481.53:590.15:438:27First Quarter7Mon
8Tue9:582.611:203.84:561.34:390.45:438:27First Quarter8Tue
9Wed11:172.46:041.05:180.75:438:28First Quarter9Wed
10Thu12:014.012:312.37:080.65:571.05:438:29Waxing Gibbous10Thu
11Fri12:404.01:372.38:070.36:361.25:438:29Waxing Gibbous11Fri
12Sat1:144.12:372.49:000.07:161.45:428:29Waxing Gibbous12Sat
13Sun1:454.13:332.49:48-0.28:001.65:428:30Waxing Gibbous13Sun
14Mon2:114.14:252.510:31-0.38:491.85:428:30Full Moon14Mon
15Tue2:364.15:132.611:10-0.49:401.85:428:31Full Moon15Tue
16Wed3:054.15:562.711:46-0.410:301.85:438:31Full Moon16Wed
17Thu3:404.16:342.912:19-0.45:438:31Full Moon17Thu
18Fri4:204.17:073.012:51-0.45:438:32Waning Gibbous18Fri
19Sat5:054.07:393.212:061.71:23-0.35:438:32Waning Gibbous19Sat
20Sun5:553.98:123.412:561.61:55-0.25:438:32Waning Gibbous20Sun
21Mon6:483.78:463.61:501.52:300.05:438:33Waning Gibbous21Mon
22Tue7:493.39:253.82:531.43:080.25:438:33Third Quarter22Tue
23Wed9:032.910:084.04:061.23:500.45:448:33Third Quarter23Wed
24Thu10:362.610:544.25:251.04:360.75:448:33Third Quarter24Thu
25Fri12:072.46:420.75:251.05:448:33Waning Crescent25Fri
26Sat1:272.37:530.36:201.35:458:33Waning Crescent26Sat
27Sun12:324.62:382.48:56-0.17:211.55:458:33Waning Crescent27Sun
28Mon1:204.63:422.59:52-0.48:291.75:458:33Waning Crescent28Mon
29Tue2:084.64:422.710:42-0.59:351.85:468:33New Moon29Tue
30Wed2:564.55:362.911:27-0.610:371.85:468:33New Moon30Wed
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