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 07:22 AM and sunset is at 04:54 PM.
Days 1–3 Weather SummaryHeavy rain (total 42mm), heaviest during Wed night. Cool air temperatures (max 17°C on Tue morning, min 11°C on Thu afternoon). Winds increasing (light winds from the SSE on Wed morning, near gales from the S by Wed night). | Days 4–6 Weather SummaryModerate rain (total 15mm), heaviest on Fri night. Cool air temperatures (max 13°C on Fri morning, min 7°C on Sun night). Winds decreasing (strong winds from the SSW on Fri morning, light winds from the NNE by Sat night). | Days 7–9 Weather SummaryMostly dry. Very mild (max 12°C on Mon afternoon, min 7°C on Mon morning). Wind will be generally light. | Days 10–12 Weather SummaryModerate rain (total 11mm), heaviest on Thu night. Very mild (max 14°C on Thu afternoon, min 9°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 1 | Friday 2 | Saturday 3 | |||||||||||||||||||||||||
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 | night | |
Wave Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
High Tide | 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 | 9:36PM1.29m | 8:05AM2.09m | 10:39PM1.41m | 8:55AM2.15m | 11:31PM1.49m | 9:48AM2.18m | 00:18AM1.54m | 10:40AM2.17m | 1:02AM1.58m | |||||||||||||
Low Tide | 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 | 1:43AM0.88m | 3:21PM-0.30m | 2:44AM0.96m | 4:11PM-0.43m | 3:42AM0.96m | 4:59PM-0.50m | 4:38AM0.93m | 5:46PM-0.51m | 5:34AM0.87m | ||||||||||||
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 |  |  |  |  |  | | | | |  | |  | |  | | | | | | | | |  | | | | | | | | | | | | | |
cloudy | some clouds | light rain | rain shwrs | light rain | rain shwrs | light rain | rain shwrs | rain shwrs | rain shwrs | risk tstorm | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | cloudy | some clouds | some clouds | cloudy | cloudy | light rain | cloudy | light rain | some clouds | clear | some clouds | light rain | |
km/h | ||||||||||||||||||||||||||||||||||||
— | — | 4 | 1 | 2 | 15 | 3 | 8 | 9 | 2 | 4 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 1 | — | — | — | 4 | |
max°C | 17 | 16 | 17 | 15 | 15 | 15 | 13 | 13 | 12 | 13 | 13 | 12 | 13 | 13 | 11 | 11 | 12 | 10 | 11 | 12 | 9 | 11 | 12 | 9 | 11 | 11 | 11 | 13 | 14 | 13 | 14 | 14 | 11 | 12 | 12 | 11 |
Moonrise | 10:09 | — | — | 10:37 | — | — | 11:02 | — | — | 11:26 | — | — | 11:50 | — | — | 12:16 | — | — | 12:46 | — | — | 1:23 | — | — | 2:09 | — | — | — | 3:06 | — | — | 4:14 | — | — | 5:30 | — |
Moonset | — | 8:31 | — | — | — | 9:35 | — | — | 10:40 | — | — | 11:46 | — | — | — | 12:53 | — | — | 2:04 | — | — | 3:19 | — | — | 4:37 | — | — | 5:53 | — | — | 7:03 | — | — | 8:01 | — | — |
 | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — |
 | — | 4:54 | — | — | 4:54 | — | — | 4:55 | — | — | 4:57 | — | — | 4:57 | — | — | 4:58 | — | — | 4:59 | — | — | 4:59 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:02 | — |
Today's sea temperature in Alcatraz Island, San Francisco Bay is 12.0° C (Statistics for 23 Dec 1981-2005 – mean: 12.3 max: 14.8 min: 10.7°C) | ||||||||||||||||||||||||||||||||||||
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