San Francisco Bay - Castro Point Weather Forecast

    • 54
    • 66

    Mostly Sunny

    • 55
    • 66

    Partly Sunny

    • 54
    • 63

    Partly Sunny

    • 56
    • 67

    Sunny

    • 55
    • 66

    Mostly Sunny

    • 55
    • 65

    Mostly Sunny

Today 31 May San Francisco Bay Shoreline

Sunny. Highs in the 70s. Northwest Winds around 5 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 31 May San Francisco Bay Shoreline

Mostly clear. Lows in the mid 50s. West Winds 10 to 20 Mph decreasing to up to 5 Mph after midnight.

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San Francisco Bay - Castro Point Temperature Statistics

May Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    61.7 °F

  • Highest 19 May, 2026

    89.6 °F

Climate (2021–Present)

Novato / Gnoss Field (16.2 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    72.5 °F
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