Alcatraz Island, San Francisco Bay Sea Conditions table showing wave height, swell direction and period.
High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at — and sunset is at —.
Days 1–4 Weather SummaryHeavy rain (total 55mm), heaviest during Sat night. Cool air temperatures (max 15°C on Fri morning, min 12°C on Thu night). Wind will be generally light. | Days 5–7 Weather SummaryHeavy rain (total 38mm), heaviest during Tue night. Cool air temperatures (max 16°C on Tue morning, min 11°C on Tue night). Winds increasing (calm on Mon morning, near gales from the SSE by Tue night). | Days 8–10 Weather SummaryHeavy rain (total 43mm), heaviest during Wed night. Very mild (max 14°C on Fri morning, min 9°C on Fri night). Winds decreasing (fresh winds from the SSW on Wed night, calm by Sat morning). | Days 11–13 Weather SummaryModerate rain (total 12mm), heaviest on Sun night. Very mild (max 12°C on Sun night, min 8°C on Tue afternoon). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tue 30 | |||||||||||||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
High Tide | 00:24AM1.40m | 10:19AM1.87m | 1:01AM1.41m | 10:55AM1.86m | 1:36AM1.41m | 11:32AM1.84m | 2:11AM1.41m | 12:10PM1.80m | 2:45AM1.42m | 12:51PM1.73m | 3:20AM1.45m | 1:35PM1.62m | 3:56AM1.49m | 2:28PM1.48m | 4:32AM1.56m | 3:34PM1.32m | 5:09AM1.66m | 5:01PM1.19m | 5:49AM1.76m | 6:44PM1.14m | 6:31AM1.88m | 8:19PM1.19m | 7:17AM1.99m | |||||||||||||
Low Tide | 4:34AM1.05m | 5:33PM-0.18m | 5:11AM1.06m | 6:07PM-0.20m | 5:47AM1.06m | 6:41PM-0.21m | 6:25AM1.04m | 7:16PM-0.20m | 7:08AM1.02m | 7:53PM-0.17m | 7:59AM0.98m | 8:31PM-0.09m | 9:01AM0.91m | 9:12PM0.03m | 10:13AM0.79m | 9:56PM0.20m | 11:27AM0.60m | 10:46PM0.39m | 12:35PM0.37m | 11:42PM0.59m | 1:35PM0.12m | 00:42AM0.76m | 2:30PM-0.11m | |||||||||||||
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some clouds | some clouds | light rain | mod rain | light rain | mod rain | heavy rain | mod rain | light rain | mod rain | cloudy | light rain | mod rain | light rain | light rain | heavy rain | clear | cloudy | heavy rain | light rain | light rain | mod rain | cloudy | some clouds | clear | clear | clear | some clouds | cloudy | cloudy | light rain | light rain | cloudy | cloudy | cloudy | light rain | |
km/h | ||||||||||||||||||||||||||||||||||||
— | — | 2 | 7 | 3 | 6 | 25 | 9 | 3 | 8 | — | 3 | 10 | 2 | 1 | 14 | — | — | 32 | 3 | 2 | 6 | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | 5 | |
max°C | 13 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 13 | 12 | 11 | 12 | 11 | 10 | 11 | 12 | 11 | 11 | 11 | 10 | 8 |
Moonrise | — | 7:23 | — | — | 8:15 | — | — | 8:59 | — | — | 9:37 | — | — | 10:09 | — | — | 10:37 | — | — | 11:02 | — | — | 11:26 | — | — | 11:50 | — | — | 12:16 | — | — | 12:46 | — | — | 1:23 | — |
Moonset | — | — | 4:25 | — | — | 5:21 | — | — | 6:22 | — | — | 7:26 | — | — | 8:31 | — | — | — | 9:35 | — | — | 10:40 | — | — | 11:46 | — | — | — | 12:53 | — | — | 2:04 | — | — | 3:19 | — |
 | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — |
 | — | — | 4:52 | — | — | 4:52 | — | — | 4:53 | — | — | 4:53 | — | — | 4:54 | — | — | 4:54 | — | — | 4:55 | — | — | 4:57 | — | — | 4:57 | — | — | 4:58 | — | — | 4:59 | — | — | 4:59 |
Today's sea temperature in Alcatraz Island, San Francisco Bay is 12.0° C (Statistics for 18 Dec 1981-2005 – mean: 12.4 max: 14.8 min: 10.9°C) | ||||||||||||||||||||||||||||||||||||
Nearest