Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Friday, August 14, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 3h 30m at 12:17 pm (0.2 ft)
Next high tide : 6:14 pm (3.7 ft)
Sunset today : 8:01 pm
Sunrise tomorrow : 6:21 am
Moon phase : Waxing Crescent (6% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Jun 1947

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:234.22:322.59:00-0.27:581.24:457:23Full Moon1Sun
2Mon1:524.23:282.69:47-0.48:351.54:457:24Full Moon2Mon
3Tue2:194.24:232.610:31-0.59:131.74:447:24Full Moon3Tue
4Wed2:454.25:172.711:12-0.69:541.84:447:25Full Moon4Wed
5Thu3:144.16:062.811:50-0.610:371.94:447:26Full Moon5Thu
6Fri3:464.06:522.912:27-0.54:437:26Waning Gibbous6Fri
7Sat4:233.97:353.11:02-0.44:437:27Waning Gibbous7Sat
8Sun5:053.78:163.212:141.91:37-0.34:437:27Waning Gibbous8Sun
9Mon5:523.58:563.31:091.82:13-0.14:437:28Waning Gibbous9Mon
10Tue6:453.29:343.42:091.82:500.14:437:28Third Quarter10Tue
11Wed7:492.910:103.53:161.73:280.34:437:29Third Quarter11Wed
12Thu9:152.610:423.64:271.54:080.54:427:29Third Quarter12Thu
13Fri10:512.411:123.85:361.24:480.84:427:30Third Quarter13Fri
14Sat12:082.46:410.95:291.04:427:30Waning Crescent14Sat
15Sun1:162.37:420.56:121.34:427:31Waning Crescent15Sun
16Mon12:164.22:202.38:380.17:011.54:427:31Waning Crescent16Mon
17Tue12:544.53:232.49:31-0.27:581.74:437:31New Moon17Tue
18Wed1:374.64:252.510:20-0.49:011.84:437:32New Moon18Wed
19Thu2:234.75:232.611:07-0.610:041.84:437:32New Moon19Thu
20Fri3:134.66:162.911:53-0.611:061.84:437:32Waxing Crescent20Fri
21Sat4:074.47:043.112:38-0.64:437:32Waxing Crescent21Sat
22Sun5:044.17:513.312:081.71:22-0.54:437:33Waxing Crescent22Sun
23Mon6:073.88:373.61:141.62:07-0.34:447:33First Quarter23Mon
24Tue7:183.49:233.82:241.52:520.04:447:33First Quarter24Tue
25Wed8:373.010:104.03:361.33:370.34:447:33First Quarter25Wed
26Thu9:572.710:544.14:481.04:210.54:457:33First Quarter26Thu
27Fri11:132.611:364.35:560.75:050.84:457:33Waxing Gibbous27Fri
28Sat12:222.56:590.45:481.14:457:33Waxing Gibbous28Sat
29Sun12:144.31:252.57:550.06:311.44:467:33Waxing Gibbous29Sun
30Mon12:494.42:242.68:45-0.27:161.64:467:33Waxing Gibbous30Mon
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 3:15 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 6% 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 (6% 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