San Francisco Bay - Red Rock Island Weather Forecast

    • 65
    • 76

    Increasing Clouds

    • 65
    • 80

    Partly Sunny

    • 61
    • 70

    Mostly Sunny

    • 59
    • 65

    Mostly Sunny

    • 58
    • 64

    Breezy

    • 58
    • 66

    Mostly Sunny

Today 8 Sep San Francisco Bay Shoreline

Sunny in the morning then becoming partly cloudy. Highs in the 80s. Light Winds. Becoming northwest 5 to 10 Mph in the afternoon.

Tonight 8 Sep San Francisco Bay Shoreline

Mostly clear. Lows around 60. Light Winds.

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San Francisco Bay - Red Rock Island Temperature Statistics

September Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 6 September, 2026

    48.2 °F

  • Average September

    64 °F

  • Highest 5 September, 2026

    80.6 °F

Climate (2021–2026)

Novato / Gnoss Field (16.2 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.4 °F
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