Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Monday, August 10, 2026
The tide is currently rising in Rio Vista, CA.
Next low tide : 8:37 pm (1.8 ft)
Next high tide : in 2h 14m at 3:33 pm (3.0 ft)
Sunset today : 8:06 pm
Sunrise tomorrow : 6:17 am
Moon phase : Waning Crescent (5% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Apr 1952

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue7:143.610:213.02:041.83:590.35:516:29First Quarter1Tue
2Wed8:213.411:153.23:131.94:550.35:496:30First Quarter2Wed
3Thu9:453.24:251.85:460.45:486:31First Quarter3Thu
4Fri12:023.311:03 AM3.15:311.66:320.55:466:32Waxing Gibbous4Fri
5Sat12:423.412:083.16:321.37:120.65:456:33Waxing Gibbous5Sat
6Sun1:173.51:013.17:261.17:470.85:436:34Waxing Gibbous6Sun
7Mon1:463.51:493.08:150.88:180.95:426:35Waxing Gibbous7Mon
8Tue2:093.52:333.09:010.68:461.15:406:36Full Moon8Tue
9Wed2:253.63:182.99:450.59:131.25:396:37Full Moon9Wed
10Thu2:413.84:042.910:270.39:421.35:376:38Full Moon10Thu
11Fri3:034.04:552.811:100.210:151.35:366:39Full Moon11Fri
12Sat3:364.15:502.811:540.010:551.45:346:40Waning Gibbous12Sat
13Sun4:154.26:492.712:430.05:336:41Waning Gibbous13Sun
14Mon5:014.27:512.81:370.05:316:41Waning Gibbous14Mon
15Tue5:534.08:522.812:381.62:360.05:306:42Third Quarter15Tue
16Wed6:543.89:513.01:461.63:370.05:296:43Third Quarter16Wed
17Thu8:093.510:453.23:051.64:360.15:276:44Third Quarter17Thu
18Fri9:443.211:333.44:261.45:310.25:266:45Third Quarter18Fri
19Sat11:133.15:411.16:210.35:256:46Waning Crescent19Sat
20Sun12:173.712:253.16:490.77:080.45:236:47Waning Crescent20Sun
21Mon12:563.91:273.07:510.47:510.65:226:48Waning Crescent21Mon
22Tue1:334.02:242.98:480.18:320.85:206:49New Moon22Tue
23Wed2:074.13:212.89:41-0.19:111.15:196:50New Moon23Wed
24Thu2:394.24:192.810:31-0.39:491.35:186:51New Moon24Thu
25Fri3:114.25:182.711:18-0.410:271.55:176:52New Moon25Fri
26Sat3:434.16:162.812:04-0.45:156:53Waxing Crescent26Sat
27Sun5:174.18:122.81:48-0.46:147:54Waxing Crescent27Sun
28Mon5:553.99:052.912:521.72:33-0.36:137:55Waxing Crescent28Mon
29Tue6:383.79:573.01:431.83:19-0.26:127:55Waxing Crescent29Tue
30Wed7:303.410:463.12:431.84:070.06:107:56First Quarter30Wed
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 6:05 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 5% 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 (5% 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