Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Wednesday, July 22, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 5h 54m at 6:09 am (0.8 ft)
Next high tide : 11:32 am (2.5 ft)
Sunset today : 8:25 pm
Sunrise tomorrow : 6:01 am
Moon phase : First Quarter (63% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Dec 2066

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:422.72:194.28:481.410:35-0.57:044:47Full Moon1Wed
2Thu4:322.72:504.29:301.511:14-0.57:054:46Full Moon2Thu
3Fri5:202.83:244.110:121.611:50-0.47:064:46Full Moon3Fri
4Sat6:062.94:014.010:561.67:074:46Waning Gibbous4Sat
5Sun6:492.94:423.812:23-0.211:43 AM1.67:084:46Waning Gibbous5Sun
6Mon7:313.05:283.612:56-0.112:331.67:094:46Waning Gibbous6Mon
7Tue8:113.16:183.31:280.11:301.67:104:46Waning Gibbous7Tue
8Wed8:513.27:183.02:010.32:341.57:104:46Third Quarter8Wed
9Thu9:293.38:362.72:370.43:441.47:114:46Third Quarter9Thu
10Fri10:043.410:062.53:160.64:551.27:124:46Third Quarter10Fri
11Sat10:373.611:242.43:570.86:010.97:134:47Third Quarter11Sat
12Sun11:083.84:401.07:010.67:144:47Waning Crescent12Sun
13Mon12:302.411:41 AM4.05:241.27:570.27:144:47Waning Crescent13Mon
14Tue1:292.412:194.26:111.38:49-0.17:154:47Waning Crescent14Tue
15Wed2:242.41:014.47:041.49:38-0.37:164:48New Moon15Wed
16Thu3:172.51:474.58:041.510:24-0.47:164:48New Moon16Thu
17Fri4:082.62:364.59:071.511:09-0.57:174:48New Moon17Fri
18Sat4:592.83:284.410:091.511:53-0.57:184:49Waxing Crescent18Sat
19Sun5:483.04:234.211:111.47:184:49Waxing Crescent19Sun
20Mon6:363.25:243.812:36-0.412:141.47:194:49Waxing Crescent20Mon
21Tue7:253.46:323.51:20-0.21:221.37:194:50Waxing Crescent21Tue
22Wed8:143.67:503.12:040.02:361.27:204:51First Quarter22Wed
23Thu9:043.89:132.82:500.33:521.17:204:51First Quarter23Thu
24Fri9:554.010:342.63:380.55:060.87:204:52First Quarter24Fri
25Sat10:434.111:472.64:270.86:140.57:214:52Waxing Gibbous25Sat
26Sun11:294.25:161.07:140.27:214:53Waxing Gibbous26Sun
27Mon12:512.612:104.36:051.28:07-0.17:224:54Waxing Gibbous27Mon
28Tue1:482.712:494.36:541.48:53-0.37:224:54Waxing Gibbous28Tue
29Wed2:392.81:254.37:421.69:35-0.37:224:55Full Moon29Wed
30Thu3:272.92:014.38:291.610:14-0.37:224:56Full Moon30Thu
31Fri4:113.02:364.29:151.710:47-0.27:224:56Full Moon31Fri
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 8:50 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 63% 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 First Quarter (63% 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