Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Friday, July 17, 2026
The tide is currently rising in Rio Vista, CA.
Next low tide : 1:29 pm (-0.1 ft)
Next high tide : in 1h 46m at 5:45 am (4.0 ft)
Sunset today : 8:28 pm
Sunrise tomorrow : 5:57 am
Moon phase : Waxing Crescent (15% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Mar 2065

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun10:203.94:301.76:300.26:376:00Waning Crescent1Sun
2Mon12:213.211:35 AM3.95:461.77:230.16:356:01Waning Crescent2Mon
3Tue1:123.412:373.86:541.68:100.16:346:02Waning Crescent3Tue
4Wed1:553.51:313.87:541.48:520.26:326:03Waning Crescent4Wed
5Thu2:343.62:203.88:471.29:290.36:316:04New Moon5Thu
6Fri3:093.73:063.79:351.110:030.56:296:05New Moon6Fri
7Sat3:413.83:533.510:200.910:340.76:286:06New Moon7Sat
8Sun5:103.85:413.412:040.87:267:07New Moon8Sun
9Mon5:373.96:323.212:020.912:460.87:257:08Waxing Crescent9Mon
10Tue6:033.97:263.112:291.11:310.77:237:09Waxing Crescent10Tue
11Wed6:304.08:262.912:571.22:180.77:227:10Waxing Crescent11Wed
12Thu7:014.09:302.81:321.43:130.87:207:11Waxing Crescent12Thu
13Fri7:393.910:362.82:161.64:140.87:197:12First Quarter13Fri
14Sat8:253.711:392.93:101.75:170.87:177:13First Quarter14Sat
15Sun9:233.64:141.86:160.77:167:14First Quarter15Sun
16Mon12:353.010:35 AM3.55:231.87:080.77:147:15First Quarter16Mon
17Tue1:213.111:53 AM3.56:291.77:550.77:137:16Waxing Gibbous17Tue
18Wed1:593.112:593.57:301.58:370.77:117:17Waxing Gibbous18Wed
19Thu2:303.21:563.68:261.29:150.77:107:18Waxing Gibbous19Thu
20Fri2:563.42:483.69:200.99:510.87:087:19Full Moon20Fri
21Sat3:213.53:403.610:120.710:250.97:077:20Full Moon21Sat
22Sun3:493.84:333.511:030.411:001.07:057:21Full Moon22Sun
23Mon4:204.05:293.311:550.211:351.17:047:22Full Moon23Mon
24Tue4:574.26:293.212:490.17:027:22Waning Gibbous24Tue
25Wed5:384.37:343.012:141.21:470.07:007:23Waning Gibbous25Wed
26Thu6:254.38:432.912:581.32:470.16:597:24Waning Gibbous26Thu
27Fri7:174.19:532.91:511.53:510.16:577:25Third Quarter27Fri
28Sat8:183.811:003.02:571.64:560.16:567:26Third Quarter28Sat
29Sun9:373.64:151.75:560.16:547:27Third Quarter29Sun
30Mon12:013.211:06 AM3.45:341.66:520.16:537:28Third Quarter30Mon
31Tue12:543.412:263.36:461.47:420.26:517:29Waning Crescent31Tue
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 9:37 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 15% 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 (15% 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