San Francisco Bay - Sierra Point Marina Weather Forecast

    • 58
    • 71

    Becoming Sunny

    • 58
    • 72

    Partly Sunny

    • 58
    • 75

    Partly Sunny

    • 58
    • 69

    Mostly Cloudy

    • 58
    • 71

    Partly Sunny

    • 58
    • 74

    Mostly Sunny

Today 17 Sep San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming sunny. Highs in the lower to mid 70s. South Winds up to 5 Mph. Becoming west 5 to 15 Mph in the afternoon.

Tonight 17 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. West Winds 10 to 15 Mph decreasing to up to 5 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

    68.2 °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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