Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Friday, July 17, 2026
The tide is currently falling in Rio Vista, CA.
Next low tide : in 1h 03m at 12:43 am (1.6 ft)
Next high tide : 5:45 am (4.0 ft)
Sunset today : 8:28 pm
Sunrise tomorrow : 5:56 am
Moon phase : Waxing Crescent (8% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Jan 1984

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun2:342.71:364.47:431.59:47-0.47:234:57New Moon1Sun
2Mon3:282.82:104.48:301.710:30-0.47:234:58New Moon2Mon
3Tue4:202.92:454.39:161.811:09-0.47:234:58New Moon3Tue
4Wed5:082.93:214.210:021.911:46-0.37:234:59New Moon4Wed
5Thu5:523.04:004.110:471.97:235:00Waxing Crescent5Thu
6Fri6:333.14:433.912:21-0.211:33 AM1.97:235:01Waxing Crescent6Fri
7Sat7:123.25:293.712:540.012:221.87:235:02Waxing Crescent7Sat
8Sun7:513.36:213.41:260.21:181.87:235:03Waxing Crescent8Sun
9Mon8:293.47:253.01:590.42:231.87:235:04First Quarter9Mon
10Tue9:073.58:542.72:350.63:381.77:235:05First Quarter10Tue
11Wed9:443.610:242.63:140.94:541.57:235:06First Quarter11Wed
12Thu10:203.711:412.53:561.16:051.27:225:07First Quarter12Thu
13Fri10:553.94:421.37:060.97:225:08Waxing Gibbous13Fri
14Sat12:472.511:31 AM4.15:291.58:000.67:225:09Waxing Gibbous14Sat
15Sun1:462.612:114.36:211.68:490.37:225:10Waxing Gibbous15Sun
16Mon2:382.612:554.57:161.79:330.17:215:11Waxing Gibbous16Mon
17Tue3:262.71:424.68:141.710:16-0.17:215:12Full Moon17Tue
18Wed4:112.82:314.79:121.710:57-0.17:205:13Full Moon18Wed
19Thu4:533.03:244.610:091.611:36-0.17:205:14Full Moon19Thu
20Fri5:343.14:194.511:051.47:195:15Waning Gibbous20Fri
21Sat6:163.35:174.212:160.012:021.37:195:16Waning Gibbous21Sat
22Sun6:583.56:203.912:550.11:051.37:185:17Waning Gibbous22Sun
23Mon7:443.77:293.51:350.32:131.27:185:18Third Quarter23Mon
24Tue8:323.98:453.12:180.63:271.17:175:19Third Quarter24Tue
25Wed9:234.110:042.93:040.84:420.97:175:21Third Quarter25Wed
26Thu10:164.211:202.83:531.15:520.67:165:22Third Quarter26Thu
27Fri11:074.34:461.36:560.37:155:23Waning Crescent27Fri
28Sat12:292.811:55 AM4.35:411.57:520.17:145:24Waning Crescent28Sat
29Sun1:292.912:394.36:371.78:41-0.17:145:25Waning Crescent29Sun
30Mon2:223.01:214.37:321.89:25-0.27:135:26Waning Crescent30Mon
31Tue3:103.12:014.38:241.810:05-0.27:125:27New Moon31Tue
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 3:14 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 8% 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 (8% 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