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 07:18 AM and sunset is at 04:52 PM.
Days 1–3 Weather SummaryHeavy rain (total 31mm), heaviest during Sat night. Cool air temperatures (max 15°C on Fri morning, min 12°C on Thu morning). Wind will be generally light. | Days 4–6 Weather SummaryHeavy rain (total 110mm), heaviest during Mon afternoon. Cool air temperatures (max 15°C on Sun morning, min 11°C on Mon morning). Winds increasing (calm on Mon afternoon, fresh winds from the S by Tue afternoon). | Days 7–9 Weather SummaryHeavy rain (total 46mm), heaviest during Wed night. Very mild (max 14°C on Wed afternoon, min 10°C on Fri night). Winds increasing (light winds from the E on Wed morning, strong winds from the S by Thu night). | Days 10–12 Weather SummarySome drizzle, heaviest during Sat afternoon. Very mild (max 13°C on Sat morning, min 9°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | |||||||||||||||||||||||||
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 | 9:44AM1.86m | 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 | |||||||||||||
Low Tide | 4:59PM-0.15m | 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 | |||||||||||||
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clear | clear | cloudy | cloudy | light rain | light rain | light rain | mod rain | heavy rain | heavy rain | heavy rain | light rain | heavy rain | heavy rain | mod rain | light rain | heavy rain | rain shwrs | some clouds | rain shwrs | heavy rain | light rain | light rain | mod rain | mod rain | light rain | rain shwrs | clear | rain shwrs | some clouds | some clouds | cloudy | some clouds | some clouds | some clouds | some clouds | |
km/h | ||||||||||||||||||||||||||||||||||||
— | — | — | — | 4 | 4 | 3 | 7 | 13 | 23 | 15 | 2 | 17 | 25 | 7 | 1 | 12 | 8 | — | 1 | 16 | 3 | 4 | 8 | 9 | 3 | 2 | — | 1 | — | — | — | — | — | — | — | |
max°C | 14 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 11 | 12 | 14 | 14 | 14 | 11 | 13 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 13 | 13 | 10 | 11 | 12 | 11 | 10 | 12 | 10 |
Moonrise | 6:27 | — | — | 7:23 | — | — | 8:15 | — | — | 8:59 | — | — | 9:37 | — | — | 10:09 | — | — | 10:37 | — | — | 11:02 | — | — | 11:26 | — | — | 11:50 | — | — | 12:16 | — | — | 12:46 | — | — |
Moonset | — | 3:36 | — | — | 4:25 | — | — | 5:21 | — | — | 6:22 | — | — | 7:26 | — | — | 8:31 | — | — | — | 9:35 | — | — | 10:40 | — | — | 11:46 | — | — | — | 12:53 | — | — | 2:04 | — | — |
 | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — |
 | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:53 | — | — | 4:53 | — | — | 4:54 | — | — | 4:54 | — | — | 4:55 | — | — | 4:57 | — | — | 4:57 | — | — | 4:58 | — | — | 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: 11.1°C) | ||||||||||||||||||||||||||||||||||||
Nearest