San Francisco Bay - Sierra Point Marina Weather Forecast

    • 58
    • 67

    Mostly Cloudy

    • 58
    • 72

    Partly Sunny

    • 58
    • 73

    Partly Sunny

    • 58
    • 73

    Mostly Cloudy

    • 58
    • 70

    Mostly Cloudy

    • 58
    • 73

    Partly Sunny

Today 16 Sep San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming partly cloudy. Highs near 70. Southwest Winds 10 to 20 Mph.

Tonight 16 Sep San Francisco Bay Shoreline

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph becoming south 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Sierra Point Marina Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (3.7 miles)

  • Lowest 14 September, 2026

    55.9 °F

  • Average September

    68.6 °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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