Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Wednesday, July 22, 2026
The tide is currently rising in Rio Vista, CA.
Next low tide : 6:09 am (0.8 ft)
Next high tide (tomorrow) : in 45m at 10:33 pm (4.2 ft)
Sunset today : 8:25 pm
Sunrise tomorrow : 6:00 am
Moon phase : First Quarter (53% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Oct 2066

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri2:143.52:503.89:080.39:340.67:036:49Full Moon1Fri
2Sat3:063.43:254.09:480.410:270.47:036:47Full Moon2Sat
3Sun3:573.33:584.010:250.611:170.37:046:46Full Moon3Sun
4Mon4:483.14:294.111:000.87:056:44Full Moon4Mon
5Tue5:423.05:004.112:050.211:32 AM1.07:066:43Waning Gibbous5Tue
6Wed6:382.95:314.112:520.212:061.27:076:41Waning Gibbous6Wed
7Thu7:382.86:064.01:390.212:421.47:086:40Waning Gibbous7Thu
8Fri8:402.86:453.82:290.21:261.67:096:38Waning Gibbous8Fri
9Sat9:422.87:333.63:220.22:211.77:106:37Third Quarter9Sat
10Sun10:422.98:343.44:180.33:281.77:116:35Third Quarter10Sun
11Mon11:373.09:563.25:120.44:411.77:126:34Third Quarter11Mon
12Tue12:253.26:030.45:501.57:136:32Third Quarter12Tue
13Wed1:073.36:480.56:521.37:146:31Waning Crescent13Wed
14Thu12:283.01:423.47:280.57:481.07:156:30Waning Crescent14Thu
15Fri1:233.02:103.58:030.68:390.87:166:28Waning Crescent15Fri
16Sat2:113.02:323.68:350.89:260.67:176:27Waning Crescent16Sat
17Sun2:563.02:503.79:050.910:130.47:186:25New Moon17Sun
18Mon3:402.93:093.99:341.010:580.27:196:24New Moon18Mon
19Tue4:272.83:374.110:061.111:440.07:206:23New Moon19Tue
20Wed5:172.84:124.310:431.27:216:21New Moon20Wed
21Thu6:122.74:544.312:32-0.111:26 AM1.27:226:20Waxing Crescent21Thu
22Fri7:132.65:414.31:23-0.112:151.37:236:19Waxing Crescent22Fri
23Sat8:162.76:354.12:17-0.11:141.47:246:17Waxing Crescent23Sat
24Sun9:212.87:383.73:16-0.12:251.57:256:16First Quarter24Sun
25Mon10:232.98:583.44:150.03:491.57:266:15First Quarter25Mon
26Tue11:213.210:353.15:130.05:121.37:276:14First Quarter26Tue
27Wed12:133.56:070.16:271.07:286:12Waxing Gibbous27Wed
28Thu12:013.012:583.76:570.27:340.77:296:11Waxing Gibbous28Thu
29Fri1:103.01:393.97:430.38:340.47:306:10Waxing Gibbous29Fri
30Sat2:092.92:154.18:260.59:290.17:316:09Waxing Gibbous30Sat
31Sun3:022.92:484.19:060.710:20-0.17:326:08Full Moon31Sun
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 2:21 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 neap phase. Tonight's moon is 53% 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 minimum.

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 First Quarter (53% illuminated). This places Rio Vista, CA in a neap tide cycle, so tidal ranges are near their weekly minimum 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