Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Saturday, August 8, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 33m at 7:50 am (0.4 ft)
Next high tide : 1:42 pm (2.6 ft)
Sunset today : 8:08 pm
Sunrise tomorrow : 6:15 am
Moon phase : Waning Crescent (21% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Nov 1955

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:222.63:074.49:451.211:28-0.36:325:08Full Moon1Tue
2Wed5:202.63:524.410:341.26:335:07Waning Gibbous2Wed
3Thu6:212.64:424.312:19-0.311:29 AM1.36:345:06Waning Gibbous3Thu
4Fri7:242.75:384.01:12-0.312:311.46:355:05Waning Gibbous4Fri
5Sat8:252.96:443.62:07-0.21:431.46:365:04Third Quarter5Sat
6Sun9:243.18:043.33:04-0.13:011.36:375:03Third Quarter6Sun
7Mon10:203.39:333.03:590.04:171.16:385:02Third Quarter7Mon
8Tue11:103.610:532.94:520.15:280.86:395:01Waning Crescent8Tue
9Wed11:553.85:410.36:330.56:405:00Waning Crescent9Wed
10Thu12:012.812:344.06:260.47:310.26:414:59Waning Crescent10Thu
11Fri12:592.81:094.17:070.68:24-0.16:434:58Waning Crescent11Fri
12Sat1:522.81:414.17:460.99:12-0.36:444:57New Moon12Sat
13Sun2:432.72:104.18:221.19:58-0.46:454:56New Moon13Sun
14Mon3:342.72:374.18:571.310:40-0.46:464:56New Moon14Mon
15Tue4:242.73:034.09:311.411:21-0.46:474:55New Moon15Tue
16Wed5:152.73:324.010:091.56:484:54Waxing Crescent16Wed
17Thu6:042.74:053.912:00-0.410:50 AM1.56:494:53Waxing Crescent17Thu
18Fri6:522.84:433.712:38-0.311:36 AM1.66:504:53Waxing Crescent18Fri
19Sat7:392.95:273.51:16-0.112:281.66:514:52Waxing Crescent19Sat
20Sun8:253.06:173.21:550.01:271.66:524:51First Quarter20Sun
21Mon9:093.17:182.92:360.22:341.66:534:51First Quarter21Mon
22Tue9:523.28:432.73:190.33:471.46:544:50First Quarter22Tue
23Wed10:303.310:202.54:030.54:581.26:554:50First Quarter23Wed
24Thu11:043.511:362.54:460.66:030.96:564:49Waxing Gibbous24Thu
25Fri11:353.75:280.87:030.66:584:49Waxing Gibbous25Fri
26Sat12:392.512:063.96:090.97:590.36:594:49Waxing Gibbous26Sat
27Sun1:362.512:414.26:531.18:520.07:004:48Waxing Gibbous27Sun
28Mon2:312.51:194.47:401.29:42-0.37:014:48Full Moon28Mon
29Tue3:262.52:024.58:311.310:31-0.47:024:48Full Moon29Tue
30Wed4:212.52:484.59:271.411:18-0.57:034:47Full 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 10:46 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 transitional phase. Tonight's moon is 21% 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 shifting between spring and neap.

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 (21% illuminated). This places Rio Vista, CA in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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