San Francisco Bay - Bay Slough Weather Forecast

    • 60
    • 83

    Sunny

    • 65
    • 86

    Increasing Clouds

    • 67
    • 91

    Partly Sunny

    • 62
    • 85

    Mostly Sunny

    • 59
    • 76

    Mostly Sunny

    • 58
    • 73

    Mostly Sunny

    • 58
    • 75

    Mostly Sunny

Today 7 Sep San Francisco Bay Shoreline

Sunny. Highs in the upper 70s to mid 80s. Northwest Winds 5 to 15 Mph.

Tonight 7 Sep San Francisco Bay Shoreline

Clear. Lows around 60. West Winds 10 to 15 Mph in the evening. Becoming light.

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San Francisco Bay - Bay Slough Temperature Statistics

September Temperature

San Carlos Airport (1.9 miles)

  • Lowest 5 September, 2026

    55.4 °F

  • Average September

    63.2 °F

  • Highest 5 September, 2026

    77 °F

Climate (2021–2026)

San Carlos Airport (1.9 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    57 °F

  • Average High 2021–2026

    68.3 °F
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