San Francisco Bay - Castro Point Weather Forecast

    • 55
    • 62

    Increasing Clouds

    • 57
    • 59

    Mostly Cloudy

    • 57
    • 60

    Partly Sunny

    • 58
    • 62

    Partly Sunny

    • 58
    • 63

    Partly Sunny

    • 58
    • 64

    Mostly Sunny

Today 30 Aug San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 70s. Southwest Winds 5 to 10 Mph becoming west 10 to 20 Mph in the afternoon.

Tonight 30 Aug San Francisco Bay Shoreline

Mostly clear in the evening then becoming mostly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph. Becoming southwest 5 to 10 Mph after midnight.

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San Francisco Bay - Castro Point Temperature Statistics

August Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 10 August, 2026

    51.8 °F

  • Average August

    66.2 °F

  • Highest 2 August, 2026

    98.6 °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

    72.5 °F
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