Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Sunday, August 16, 2026
The tide is currently rising in Rio Vista, CA.
Next low tide : 1:18 pm (0.6 ft)
Next high tide : in 3h 53m at 6:36 am (3.5 ft)
Sunset today : 7:59 pm
Sunrise tomorrow : 6:22 am
Moon phase : Waxing Crescent (19% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Jan 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:163.58:373.43:090.03:251.48:235:57First Quarter1Sat
2Sun10:083.810:013.13:580.24:421.28:235:57First Quarter2Sun
3Mon11:004.011:232.94:480.45:581.08:235:58First Quarter3Mon
4Tue11:514.15:390.67:070.78:235:59Waxing Gibbous4Tue
5Wed12:372.812:384.36:300.88:100.48:236:00Waxing Gibbous5Wed
6Thu1:422.81:204.47:191.09:060.18:236:01Waxing Gibbous6Thu
7Fri2:402.92:004.48:081.29:56-0.18:236:02Waxing Gibbous7Fri
8Sat3:342.92:364.48:561.410:41-0.28:236:03Full Moon8Sat
9Sun4:263.03:124.49:421.611:22-0.28:236:04Full Moon9Sun
10Mon5:143.03:484.310:271.68:236:05Full Moon10Mon
11Tue6:003.14:244.212:00-0.211:11 AM1.78:236:05Full Moon11Tue
12Wed6:433.25:034.112:35-0.111:54 AM1.78:236:06Waning Gibbous12Wed
13Thu7:233.25:454.01:060.012:381.78:226:07Waning Gibbous13Thu
14Fri8:013.36:293.81:360.21:251.78:226:08Waning Gibbous14Fri
15Sat8:383.37:183.52:050.32:171.78:226:10Waning Gibbous15Sat
16Sun9:153.48:173.22:350.53:181.78:216:11Third Quarter16Sun
17Mon9:513.59:322.93:100.74:281.68:216:12Third Quarter17Mon
18Tue10:283.610:582.73:500.95:401.48:216:13Third Quarter18Tue
19Wed11:053.74:351.16:481.28:206:14Third Quarter19Wed
20Thu12:152.711:44 AM3.85:241.37:500.98:206:15Waning Crescent20Thu
21Fri1:212.712:254.06:151.48:450.68:196:16Waning Crescent21Fri
22Sat2:182.71:094.27:101.69:350.38:196:17Waning Crescent22Sat
23Sun3:102.81:554.48:091.610:220.18:186:18Waning Crescent23Sun
24Mon3:582.92:444.59:101.611:06-0.18:186:19New Moon24Mon
25Tue4:443.03:344.610:091.511:49-0.18:176:20New Moon25Tue
26Wed5:293.24:274.511:071.48:166:21New Moon26Wed
27Thu6:133.35:224.412:30-0.112:031.38:166:23Waxing Crescent27Thu
28Fri6:583.56:224.11:110.01:011.38:156:24Waxing Crescent28Fri
29Sat7:433.77:263.81:530.12:031.28:146:25Waxing Crescent29Sat
30Sun8:313.98:373.52:360.33:121.28:136:26First Quarter30Sun
31Mon9:224.09:543.23:210.64:251.18:126:27First Quarter31Mon
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 9:57 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 spring phase. Tonight's moon is 19% 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 (19% 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