San Francisco Bay - Sierra Point Marina Weather Forecast

    • 56
    • 78

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 58
    • 78

    Partly Sunny

    • 59
    • 79

    Partly Sunny

    • 60
    • 80

    Partly Sunny

    • 59
    • 79

    Mostly Sunny

Today 29 Sep San Francisco Bay Shoreline

Sunny. Highs in the upper 70s to mid 80s. West Winds up to 5 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 29 Sep San Francisco Bay Shoreline

Mostly clear. Lows in the upper 50s. Southwest Winds 10 to 20 Mph. Becoming south 5 to 10 Mph after midnight.

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  • Temperature Real-Time

San Francisco Bay - Sierra Point Marina Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (3.7 miles)

  • Lowest 23 September, 2026

    55.7 °F

  • Average September

    66.8 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (3.7 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    66.8 °F
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