Tides Today & Tomorrow in Rio Vista, CA

TIDE TIMES for Friday, October 9, 2026
The tide is currently rising in Rio Vista, CA.

Next low tide : 9:43 am (0.5 ft)
Next high tide : in 2h 25m at 3:01 am (3.3 ft)
Sunset today : 6:37 pm
Sunrise tomorrow : 7:10 am
Moon phase : New Moon (1% illuminated)
Tide Station Location : Station #9415316
Common Questions About Tides

Rio Vista, CA Tides - Oct 2026

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Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Thu	8:28	2.6	6:56	4.3	2:26	0.3	1:24	1.4	7:02	6:49		1	Thu
2	Fri	9:48	2.6	7:54	4.1	3:37	0.3	2:29	1.6	7:03	6:48		2	Fri
3	Sat	11:03	2.7	9:06	3.8	4:47	0.3	3:50	1.7	7:04	6:46		3	Sat
4	Sun			12:07	2.9	5:53	0.2	5:16	1.6	7:05	6:45		4	Sun
5	Mon			1:00	3.2	6:50	0.1	6:33	1.4	7:06	6:43		5	Mon
6	Tue	12:02	3.5	1:44	3.4	7:40	0.1	7:40	1.1	7:07	6:42		6	Tue
7	Wed	1:11	3.5	2:23	3.7	8:25	0.1	8:41	0.8	7:08	6:40		7	Wed
8	Thu	2:09	3.4	2:58	3.8	9:06	0.3	9:36	0.5	7:09	6:39		8	Thu
9	Fri	3:01	3.3	3:30	3.9	9:43	0.5	10:27	0.3	7:10	6:37		9	Fri
10	Sat	3:51	3.2	3:59	4.0	10:17	0.7	11:15	0.2	7:11	6:36		10	Sat
11	Sun	4:41	3.0	4:26	4.0	10:46	0.9			7:12	6:34		11	Sun
12	Mon	5:34	2.9	4:52	4.0	12:02	0.1	11:14 AM	1.1	7:12	6:33		12	Mon
13	Tue	6:30	2.7	5:18	4.0	12:49	0.0	11:42 AM	1.3	7:13	6:31		13	Tue
14	Wed	7:30	2.7	5:48	4.0	1:36	0.0	12:15	1.5	7:14	6:30		14	Wed
15	Thu	8:32	2.6	6:24	3.8	2:25	0.1	12:57	1.7	7:15	6:29		15	Thu
16	Fri	9:34	2.7	7:07	3.6	3:17	0.1	1:52	1.8	7:16	6:27		16	Fri
17	Sat	10:34	2.8	8:03	3.3	4:11	0.2	3:00	1.9	7:17	6:26		17	Sat
18	Sun	11:28	2.9	9:22	3.1	5:05	0.2	4:18	1.8	7:18	6:24		18	Sun
19	Mon			12:16	3.1	5:55	0.3	5:33	1.7	7:19	6:23		19	Mon
20	Tue			12:56	3.2	6:40	0.3	6:38	1.4	7:20	6:22		20	Tue
21	Wed	12:20	2.9	1:29	3.3	7:20	0.4	7:36	1.1	7:21	6:20		21	Wed
22	Thu	1:17	2.9	1:56	3.5	7:56	0.5	8:27	0.9	7:22	6:19		22	Thu
23	Fri	2:07	2.9	2:18	3.6	8:29	0.7	9:16	0.6	7:23	6:18		23	Fri
24	Sat	2:53	2.9	2:38	3.8	9:01	0.8	10:04	0.4	7:24	6:17		24	Sat
25	Sun	3:39	2.8	3:02	4.0	9:32	1.0	10:51	0.1	7:25	6:15		25	Sun
26	Mon	4:29	2.7	3:33	4.3	10:05	1.1	11:40	0.0	7:26	6:14		26	Mon
27	Tue	5:24	2.6	4:10	4.4	10:42	1.2			7:27	6:13		27	Tue
28	Wed	6:24	2.5	4:52	4.5	12:30	-0.2	11:26 AM	1.3	7:28	6:12		28	Wed
29	Thu	7:30	2.5	5:40	4.4	1:23	-0.2	12:17	1.4	7:29	6:10		29	Thu
30	Fri	8:37	2.5	6:34	4.1	2:19	-0.2	1:19	1.5	7:30	6:09		30	Fri
31	Sat	9:43	2.7	7:38	3.8	3:19	-0.1	2:34	1.6	7:32	6:08		31	Sat
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (9415316)

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When is the lowest tide this week in Rio Vista, CA?

The lowest tide this week in Rio Vista, CA is 0.0 ft on Wednesday, Oct 14 at 1:36 am.

When is the highest tide this week in Rio Vista, CA?

The highest tide this week in Rio Vista, CA is 4.0 ft on Monday, Oct 12 at 4:52 pm — worth noting for launching your boat and being alert for possible high tide flooding.

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 1% 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 time is high tide in Rio Vista, CA today?

High tides in Rio Vista, CA today: 3:01 am (3.3 ft), 3:30 pm (3.9 ft). The 3:30 pm high of 3.9 ft is notably higher than the other — known as diurnal inequality, common on coasts influenced by lunar declination.

What time is low tide in Rio Vista, CA today?

Low tides in Rio Vista, CA today: 9:43 am (0.5 ft), 10:27 pm (0.3 ft).

What is the tidal range in Rio Vista, CA today?

Today's tidal range in Rio Vista, CA is 3.6 ft — the difference between the day's highest and lowest water level. This month's average daily range is about 3.6 ft, so today's swing is typical.

What is the moon phase in Rio Vista, CA tonight?

Tonight the moon over Rio Vista, CA is New Moon (1% illuminated). This places Rio Vista, CA in a spring tide cycle, so tidal ranges are near their weekly maximum this week.

What type of tides does Rio Vista, CA have — semi-diurnal, diurnal, or mixed?

Rio Vista, CA has semi-diurnal tides — two high tides and two low tides roughly every 24 hours and 50 minutes, with similar heights.

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

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