San Gregorio State Beach Weather Forecast

    • 46
    • 68

    Partly Sunny

    • 47
    • 60

    Partly Sunny

    • 50
    • 60

    Mostly Cloudy

    • 50
    • 58

    Mostly Cloudy

    • 49
    • 58

    Areas Fog

    • 49
    • 58

    Mostly Cloudy

Today 20 May San Francisco Peninsula Coast

Partly cloudy. Highs around 70. West Winds 5 to 10 Mph.

Tonight 20 May San Francisco Peninsula Coast

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. Southwest Winds up to 5 Mph.

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San Gregorio State Beach Temperature Statistics

May Temperature

Half Moon Bay Airport (14.3 miles)

  • Lowest 14 May, 2026

    46.4 °F

  • Average May

    55.5 °F

  • Highest 18 May, 2026

    73.4 °F

Climate (2021–Present)

Half Moon Bay Airport (14.3 miles)

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  • Average Low 2021–2026

    48.5 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    60.9 °F
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