San Francisco Bay - Fort Mason Weather Forecast

    • 60
    • 63

    Decreasing Clouds

    • 58
    • 62

    Breezy

    • 58
    • 64

    Mostly Sunny

    • 58
    • 65

    Partly Sunny

    • 58
    • 62

    Mostly Cloudy

    • 58
    • 62

    Partly Sunny

Today 11 Sep San Francisco

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s. West Winds 10 to 20 Mph.

Tonight 11 Sep San Francisco

Partly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph.

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San Francisco Bay - Fort Mason Temperature Statistics

September Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 7 September, 2026

    53.7 °F

  • Average September

    66.8 °F

  • Highest 8 September, 2026

    84 °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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