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 06:20 AM and sunset is at 07:54 PM.
Days 1–3 Weather SummaryMostly dry. Cool air temperatures (max 15°C on Fri afternoon, min 9°C on Fri night). Winds decreasing (fresh winds from the W on Fri afternoon, calm by Sat morning). | Days 4–6 Weather SummaryMostly dry. Cool air temperatures (max 17°C on Mon afternoon, min 9°C on Sun night). Wind will be generally light. | Days 7–9 Weather SummaryMostly dry. Very mild (max 15°C on Wed afternoon, min 9°C on Thu night). Winds decreasing (fresh winds from the WNW on Thu afternoon, light winds from the NNW by Fri night). | Days 10–12 Weather SummaryMostly dry. Very mild (max 16°C on Sat afternoon, min 9°C on Sat morning). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | Wednesday 1 | Thursday 2 | Friday 3 | Saturday 4 | Sunday 5 | Monday 6 | |||||||||||||||||||||||||
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 | 2:31PM1.28m | 1:11AM1.72m | 3:24PM1.25m | 1:45AM1.71m | 4:23PM1.22m | 2:25AM1.67m | 5:30PM1.21m | 6:37PM1.24m | 7:35PM1.30m | 5:32AM1.51m | 8:20PM1.40m | 6:53AM1.46m | 8:58PM1.51m | 8:13AM1.44m | 9:33PM1.63m | 9:28AM1.45m | 10:07PM1.76m | 10:36AM1.46m | 10:41PM1.87m | 11:40AM1.47m | 11:15PM1.95m | |||||||||||||||
Low Tide | 7:26AM-0.16m | 7:03PM0.80m | 8:04AM-0.21m | 7:36PM0.89m | 8:47AM-0.22m | 8:15PM0.97m | 9:36AM-0.21m | 9:08PM1.03m | 10:33AM-0.18m | 10:25PM1.05m | 11:36AM-0.14m | 00:00AM1.00m | 12:39PM-0.11m | 1:24AM0.86m | 1:38PM-0.07m | 2:31AM0.64m | 2:31PM-0.01m | 3:27AM0.38m | 3:20PM0.09m | 4:18AM0.11m | 4:06PM0.22m | 5:06AM-0.13m | 4:51PM0.36m | |||||||||||||
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some clouds | some clouds | some clouds | some clouds | clear | clear | clear | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | clear | clear | cloudy | cloudy | cloudy | some clouds | some clouds | some clouds | some clouds | some clouds | clear | |
km/h | ||||||||||||||||||||||||||||||||||||
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max°C | 13 | 14 | 12 | 13 | 15 | 12 | 13 | 14 | 12 | 14 | 16 | 11 | 13 | 17 | 14 | 14 | 16 | 12 | 14 | 15 | 13 | 13 | 13 | 11 | 13 | 14 | 11 | 13 | 16 | 14 | 14 | 15 | 11 | 12 | 13 | 11 |
Moonrise | — | — | 10:09 | — | — | 11:14 | — | — | — | 12:17 | — | — | 1:13 | — | — | 2:02 | — | — | 2:42 | — | — | 3:16 | — | — | 3:46 | — | — | 4:13 | — | — | 4:40 | — | — | 5:07 | — | — |
Moonset | 7:02 | — | — | 7:38 | — | — | 8:23 | — | — | 9:17 | — | — | 10:20 | — | — | 11:29 | — | — | 12:42 | — | — | 1:55 | — | — | — | 3:09 | — | — | 4:22 | — | — | 5:35 | — | — | 6:50 | — |
 | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:54 | — | — | 7:55 | — | — | 7:57 | — | — | 7:58 | — | — | 7:58 | — | — | 7:59 | — | — | 8:00 | — | — | 8:00 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:05 | — |
Today's sea temperature in Alcatraz Island, San Francisco Bay is 15.2 °C (Statistics for 25 Apr 1981-2005 – mean: 11.8 max: 14.2 min: 10.2°C) | ||||||||||||||||||||||||||||||||||||
Nearest