Half Moon Bay Weather Forecast

    • 46
    • 70

    Decreasing Clouds

    • 47
    • 68

    Mostly Sunny

    • 49
    • 69

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

    • 47
    • 66

    Mostly Sunny

    • 49
    • 70

    Partly Sunny

Today 21 Mar San Francisco Peninsula Coast

Mostly cloudy in the morning then becoming partly cloudy. Highs in the upper 60s. Northwest Winds 10 to 20 Mph.

Tonight 21 Mar San Francisco Peninsula Coast

Mostly clear. Lows in the upper 40s. Northwest Winds 10 to 20 Mph.

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  • Temperature Real-Time

Half Moon Bay Temperature Statistics

March Temperature

Half Moon Bay Airport (5 miles)

  • Lowest 11 March, 2026

    41 °F

  • Average March

    55.9 °F

  • Highest 16 March, 2026

    78.8 °F

Climate (2021–Present)

Half Moon Bay Airport (5 miles)

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  • Average Low 2021–2026

    48.3 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    60.7 °F
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