Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Saturday, August 15, 2026
The tide is currently rising in Rio Vista, CA.
Next low tide (tomorrow) : 1:23 am (1.2 ft)
Next high tide : in 3h 04m at 6:50 pm (3.9 ft)
Sunset today : 8:00 pm
Sunrise tomorrow : 6:22 am
Moon phase : Waxing Crescent (12% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Oct 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun3:083.83:443.710:160.310:340.57:026:50Full Moon1Sun
2Mon4:023.74:213.910:560.411:280.47:036:48Full Moon2Mon
3Tue4:583.54:594.011:350.67:046:46Waning Gibbous3Tue
4Wed5:573.35:384.112:220.312:150.77:056:45Waning Gibbous4Wed
5Thu7:003.16:204.11:180.212:560.97:066:43Waning Gibbous5Thu
6Fri8:082.97:064.02:160.21:421.27:076:42Waning Gibbous6Fri
7Sat9:182.97:593.83:170.22:361.47:086:40Third Quarter7Sat
8Sun10:292.99:023.64:210.23:401.57:096:39Third Quarter8Sun
9Mon11:343.010:163.45:230.14:501.67:106:37Third Quarter9Mon
10Tue12:313.26:200.15:591.57:106:36Third Quarter10Tue
11Wed1:193.47:110.07:021.37:116:35Waning Crescent11Wed
12Thu12:353.32:013.67:560.17:581.17:126:33Waning Crescent12Thu
13Fri1:313.32:383.78:370.28:490.97:136:32Waning Crescent13Fri
14Sat2:203.33:103.79:130.39:360.77:146:30Waning Crescent14Sat
15Sun3:053.33:393.79:450.510:200.57:156:29New Moon15Sun
16Mon3:483.24:023.710:130.711:020.47:166:27New Moon16Mon
17Tue4:303.14:203.710:380.811:420.47:176:26New Moon17Tue
18Wed5:132.94:363.811:030.97:186:25New Moon18Wed
19Thu5:582.84:573.912:220.311:31 AM1.07:196:23Waxing Crescent19Thu
20Fri6:472.75:283.91:020.312:051.17:206:22Waxing Crescent20Fri
21Sat7:412.76:073.91:440.312:451.37:216:21Waxing Crescent21Sat
22Sun8:422.66:533.82:340.31:341.47:226:19Waxing Crescent22Sun
23Mon9:472.77:473.73:320.32:351.57:236:18First Quarter23Mon
24Tue10:492.88:533.54:340.33:501.67:246:17First Quarter24Tue
25Wed11:462.910:183.35:340.25:111.57:256:16First Quarter25Wed
26Thu12:343.26:300.26:271.27:266:14Waxing Gibbous26Thu
27Fri1:173.47:210.27:350.97:276:13Waxing Gibbous27Fri
28Sat1:063.31:563.68:090.28:370.67:286:12Waxing Gibbous28Sat
29Sun2:083.32:323.88:540.39:350.37:296:11Waxing Gibbous29Sun
30Mon3:053.23:084.09:370.510:300.07:306:10Full Moon30Mon
31Tue4:013.13:444.110:180.611:23-0.27:326:08Full Moon31Tue
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 10:06 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 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 Waxing 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