Alcatraz Island Weather Forecast

    • 58
    • 63

    Mostly Cloudy

    • 57
    • 61

    Increasing Clouds

    • 58
    • 61

    Mostly Cloudy

    • 59
    • 63

    Partly Sunny

    • 57
    • 62

    Partly Sunny

    • 57
    • 61

    Partly Sunny

    • 57
    • 61

    Partly Sunny

Today 23 Aug San Francisco

Mostly cloudy. Highs in the lower 60s to mid 70s. Southwest Winds 5 to 15 Mph.

Tonight 23 Aug San Francisco

Mostly cloudy. Lows in the upper 50s. Southwest Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alcatraz Island Temperature Statistics

August Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 2 August, 2026

    54.6 °F

  • Average August

    65.1 °F

  • Highest 2 August, 2026

    80.7 °F

Climate (2021–2026)

Oakland, Metro Oakland International Airport (12.4 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    67.2 °F
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