San Francisco Bay - Fort Mason Weather Forecast

    • 59
    • 67

    Becoming Sunny

    • 61
    • 66

    Partly Sunny

    • 56
    • 63

    Partly Sunny

    • 57
    • 63

    Partly Sunny

    • 57
    • 61

    Partly Sunny

    • 58
    • 64

    Mostly Sunny

Today 23 Sep San Francisco

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 60s to upper 70s. Light Winds. Becoming west 10 to 15 Mph in the afternoon.

Tonight 23 Sep San Francisco

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

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San Francisco Bay - Fort Mason Temperature Statistics

September Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 14 September, 2026

    52.6 °F

  • Average September

    66.4 °F

  • Highest 9 September, 2026

    96.7 °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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