Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Wednesday, August 5, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 45m at 3:56 am (1.2 ft)
Next high tide : 9:13 am (2.7 ft)
Sunset today : 8:12 pm
Sunrise tomorrow : 6:13 am
Moon phase : Third Quarter (53% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Mar 1959

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:424.19:243.12:001.13:450.76:395:59Third Quarter1Sun
2Mon8:504.010:373.13:031.34:550.56:376:00Third Quarter2Mon
3Tue10:043.911:433.24:141.45:590.46:366:01Third Quarter3Tue
4Wed11:153.95:251.46:560.36:346:02Waning Crescent4Wed
5Thu12:403.412:183.96:321.37:480.26:336:03Waning Crescent5Thu
6Fri1:293.51:133.97:331.28:340.26:316:04Waning Crescent6Fri
7Sat2:133.62:023.88:281.19:170.36:306:05New Moon7Sat
8Sun2:533.72:493.89:181.09:550.46:286:06New Moon8Sun
9Mon3:303.73:353.710:050.910:300.56:276:07New Moon9Mon
10Tue4:043.84:233.610:490.911:030.76:256:08New Moon10Tue
11Wed4:363.85:123.511:320.811:330.96:246:09Waxing Crescent11Wed
12Thu5:073.86:033.312:140.86:226:10Waxing Crescent12Thu
13Fri5:383.86:583.212:041.012:590.86:216:11Waxing Crescent13Fri
14Sat6:093.87:573.112:381.21:490.86:196:12Waxing Crescent14Sat
15Sun6:463.79:003.01:191.32:460.96:186:13First Quarter15Sun
16Mon7:293.610:043.02:091.53:470.96:166:14First Quarter16Mon
17Tue8:233.511:033.03:071.64:480.96:156:15First Quarter17Tue
18Wed9:303.411:553.14:111.65:450.86:136:16First Quarter18Wed
19Thu10:413.45:151.56:350.86:126:17Waxing Gibbous19Thu
20Fri12:393.211:44 AM3.46:161.47:210.86:106:18Waxing Gibbous20Fri
21Sat1:163.312:393.57:121.28:030.76:096:19Waxing Gibbous21Sat
22Sun1:483.31:303.68:051.08:420.86:076:19Waxing Gibbous22Sun
23Mon2:163.52:203.68:560.89:200.86:066:20Full Moon23Mon
24Tue2:453.63:113.69:460.59:570.86:046:21Full Moon24Tue
25Wed3:163.84:043.610:360.310:350.96:036:22Full Moon25Wed
26Thu3:524.05:013.511:270.211:150.96:016:23Waning Gibbous26Thu
27Fri4:334.16:013.312:210.15:596:24Waning Gibbous27Fri
28Sat5:194.17:053.21:180.15:586:25Waning Gibbous28Sat
29Sun6:104.08:113.212:491.22:190.25:566:26Third Quarter29Sun
30Mon7:093.89:193.21:481.33:230.25:556:27Third Quarter30Mon
31Tue8:213.610:243.32:571.44:260.25:536:28Third Quarter31Tue
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 6:34 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 Third 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