Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Wednesday, August 12, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 4h 33m at 11:04 am (-0.1 ft)
Next high tide : 4:59 pm (3.4 ft)
Sunset today : 8:04 pm
Sunrise tomorrow : 6:19 am
Moon phase : New Moon (0% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Mar 1949

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:413.64:373.611:031.211:220.76:385:59New Moon1Tue
2Wed5:053.75:223.411:431.111:460.96:376:00Waxing Crescent2Wed
3Thu5:273.86:113.212:241.16:356:01Waxing Crescent3Thu
4Fri5:493.87:102.912:121.11:101.16:346:02Waxing Crescent4Fri
5Sat6:183.98:202.812:441.22:081.16:326:03Waxing Crescent5Sat
6Sun6:553.99:382.71:251.53:201.16:316:04First Quarter6Sun
7Mon7:413.910:532.72:151.74:351.06:296:05First Quarter7Mon
8Tue8:373.811:562.83:161.85:420.86:286:06First Quarter8Tue
9Wed9:463.84:261.96:400.66:266:07First Quarter9Wed
10Thu12:472.911:02 AM3.95:371.87:300.56:256:08Waxing Gibbous10Thu
11Fri1:283.012:123.96:441.68:150.46:236:09Waxing Gibbous11Fri
12Sat2:033.21:144.07:451.38:570.46:226:10Waxing Gibbous12Sat
13Sun2:363.32:114.08:421.09:360.56:206:11Full Moon13Sun
14Mon3:083.53:064.09:370.810:120.66:196:12Full Moon14Mon
15Tue3:403.74:013.810:310.510:470.76:176:13Full Moon15Tue
16Wed4:153.94:583.611:250.411:220.96:166:14Waning Gibbous16Wed
17Thu4:524.15:593.312:210.36:146:15Waning Gibbous17Thu
18Fri5:314.27:053.11:210.36:136:16Waning Gibbous18Fri
19Sat6:154.18:162.912:371.32:250.36:116:17Third Quarter19Sat
20Sun7:034.09:292.91:241.53:320.36:106:18Third Quarter20Sun
21Mon8:023.810:403.02:251.74:380.26:086:19Third Quarter21Mon
22Tue9:163.611:413.13:391.95:380.16:076:20Third Quarter22Tue
23Wed10:373.54:561.86:320.16:056:21Waning Crescent23Wed
24Thu12:323.311:48 AM3.46:061.77:200.16:036:22Waning Crescent24Thu
25Fri1:153.512:473.47:071.58:020.26:026:23Waning Crescent25Fri
26Sat1:533.61:383.48:001.38:400.46:006:24Waning Crescent26Sat
27Sun2:263.62:253.48:481.09:140.55:596:25New Moon27Sun
28Mon2:563.73:093.39:320.99:440.75:576:25New Moon28Mon
29Tue3:223.73:543.210:140.710:100.95:566:26New Moon29Tue
30Wed3:433.74:393.110:530.610:351.05:546:27New Moon30Wed
31Thu4:013.85:272.911:320.611:021.25:536:28Waxing Crescent31Thu
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 2:01 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 0% 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 New Moon (0% 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