Vallejo Beach Weather Forecast

    • 54
    • 64

    Increasing Clouds

    • 54
    • 70

    Mostly Cloudy

    • 54
    • 68

    Mostly Cloudy

    • 55
    • 68

    Mostly Cloudy

    • 55
    • 69

    Mostly Cloudy

    • 56
    • 68

    Mostly Cloudy

Today 13 Sep San Francisco Peninsula Coast

Partly cloudy in the morning then becoming sunny. Highs in the mid 60s. Northwest Winds 10 to 20 Mph.

Tonight 13 Sep San Francisco Peninsula Coast

Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 50s. Northwest Winds 10 to 20 Mph becoming 5 to 10 Mph after midnight.

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  • Temperature Real-Time

Vallejo Beach Temperature Statistics

September Temperature

Half Moon Bay Airport (1.9 miles)

  • Lowest 8 September, 2026

    50 °F

  • Average September

    63 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Half Moon Bay Airport (1.9 miles)

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  • Average Low 2021–2026

    48.8 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    61.1 °F
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