Tides Today & Tomorrow in San Francisco, CA

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in San Francisco, CA.

Next low tide (tomorrow) : in 7h 12m at 2:31 am (0.6 ft)
Next high tide (tomorrow) : 10:11 am (4.4 ft)
Sunset today : 7:54 pm
Sunrise tomorrow : 6:30 am
Moon phase : First Quarter (66% illuminated)
Tide Station Location : Station #9414290
Common Questions About Tides

San Francisco, CA Tides - Apr 1926

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May 1926 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Thu	12:51	5.5	1:48	4.4	7:04	0.2	6:56	1.9	5:55	6:32		1	Thu
2	Fri	1:23	5.5	2:47	4.2	7:49	0.1	7:36	2.3	5:54	6:33		2	Fri
3	Sat	2:01	5.5	3:58	4.0	8:42	0.0	8:26	2.7	5:52	6:34		3	Sat
4	Sun	2:48	5.4	5:22	4.0	9:45	0.0	9:36	3.0	5:51	6:34		4	Sun
5	Mon	3:49	5.3	6:43	4.2	10:56	-0.1	11:07	3.1	5:49	6:35		5	Mon
6	Tue	5:02	5.2	7:44	4.5			12:07	-0.3	5:48	6:36		6	Tue
7	Wed	6:20	5.3	8:31	4.8	12:31	2.8	1:11	-0.4	5:46	6:37		7	Wed
8	Thu	7:32	5.4	9:12	5.1	1:37	2.3	2:06	-0.5	5:45	6:38		8	Thu
9	Fri	8:37	5.6	9:49	5.4	2:33	1.6	2:55	-0.5	5:43	6:39		9	Fri
10	Sat	9:37	5.6	10:25	5.7	3:23	1.0	3:40	-0.3	5:42	6:40		10	Sat
11	Sun	10:33	5.6	11:01	5.9	4:11	0.4	4:22	0.0	5:40	6:41		11	Sun
12	Mon	11:29	5.4	11:36	6.1	4:58	-0.1	5:04	0.5	5:39	6:42		12	Mon
13	Tue			12:24	5.2	5:45	-0.4	5:46	1.0	5:37	6:43		13	Tue
14	Wed	12:11	6.1	1:19	4.9	6:31	-0.6	6:29	1.6	5:36	6:44		14	Wed
15	Thu	12:47	6.0	2:18	4.7	7:18	-0.5	7:15	2.1	5:35	6:44		15	Thu
16	Fri	1:25	5.7	3:22	4.4	8:08	-0.4	8:07	2.6	5:33	6:45		16	Fri
17	Sat	2:06	5.4	4:34	4.3	9:02	-0.2	9:13	2.9	5:32	6:46		17	Sat
18	Sun	2:54	5.1	5:50	4.3	10:02	0.1	10:35	3.1	5:30	6:47		18	Sun
19	Mon	3:53	4.7	6:57	4.4	11:08	0.3	11:55	2.9	5:29	6:48		19	Mon
20	Tue	5:02	4.5	7:48	4.5			12:12	0.4	5:28	6:49		20	Tue
21	Wed	6:15	4.4	8:27	4.7	1:00	2.6	1:07	0.4	5:26	6:50		21	Wed
22	Thu	7:21	4.4	8:58	4.8	1:52	2.2	1:54	0.5	5:25	6:51		22	Thu
23	Fri	8:18	4.5	9:25	5.0	2:35	1.8	2:33	0.5	5:24	6:52		23	Fri
24	Sat	9:09	4.5	9:50	5.1	3:13	1.4	3:08	0.7	5:22	6:53		24	Sat
25	Sun	9:56	4.6	10:15	5.3	3:48	0.9	3:40	0.9	5:21	6:54		25	Sun
26	Mon	10:42	4.6	10:41	5.5	4:21	0.5	4:11	1.1	5:20	6:55		26	Mon
27	Tue	11:27	4.6	11:09	5.6	4:53	0.1	4:43	1.4	5:19	6:55		27	Tue
28	Wed			12:14	4.6	5:28	-0.2	5:16	1.8	5:17	6:56		28	Wed
29	Thu			1:04	4.5	6:05	-0.5	5:53	2.1	5:16	6:57		29	Thu
30	Fri	12:11	5.8	1:57	4.4	6:46	-0.7	6:33	2.5	5:15	6:58		30	Fri
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (9414290)

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What time does the tide turn (slack tide) in San Francisco, CA today?

Slack tide in San Francisco, CA is approximately 6:21 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 San Francisco, CA?

San Francisco, CA is currently in a transitional phase. Tonight's moon is 66% 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 shifting between spring and neap.

What datum are San Francisco, 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 San Francisco, CA?

Tide predictions for San Francisco, 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 San Francisco, CA?

Tide data for San Francisco, CA is sourced from NOAA Station #9414290. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9414290.

What is the moon phase in San Francisco, CA tonight?

Tonight the moon over San Francisco, CA is First Quarter (66% illuminated). This places San Francisco, CA in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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

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