Alcatraz Island Weather Forecast

    • 57
    • 62

    Breezy

    • 57
    • 60

    Partly Sunny

    • 57
    • 60

    Partly Sunny

    • 57
    • 62

    Mostly Sunny

    • 58
    • 65

    Mostly Sunny

    • 57
    • 63

    Mostly Sunny

Today 16 Aug San Francisco

Mostly cloudy. A slight chance of drizzle in the morning. Highs in the 60s to lower 70s. West Winds 10 to 20 Mph.

Tonight 16 Aug San Francisco

Mostly cloudy. A slight chance of drizzle. Lows around 60. West Winds 10 to 20 Mph.

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Alcatraz Island Temperature Statistics

August Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 5 August, 2025

    56.6 °F

  • Average August

    64.8 °F

  • Highest 6 August, 2025

    81.6 °F

Climate (2020–Present)

Oakland, Metro Oakland International Airport (12.4 miles)

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  • Average Low 2020–2025

    51 °F

  • Average 2020–2025

    58.7 °F

  • Average High 2020–2025

    67.2 °F
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