San Francisco Bay - Sierra Point Marina Weather Forecast

    • 55
    • 79

    Mostly Sunny

    • 57
    • 79

    Partly Sunny

    • 59
    • 81

    Mostly Cloudy

    • 59
    • 81

    Partly Sunny

    • 59
    • 78

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

Today 30 Sep San Francisco Bay Shoreline

Sunny. Highs in the 70s to upper 80s. South Winds around 5 Mph increasing to northwest 10 to 20 Mph in the afternoon.

Tonight 30 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. West Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • 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 23 September, 2026

    55.7 °F

  • Average September

    66.6 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    66.8 °F
Get WillyWeather+ to remove ads