Half Moon Bay - Princeton Weather Forecast

    • 53
    • 66

    Partly Sunny

    • 53
    • 69

    Mostly Sunny

    • 53
    • 66

    Partly Sunny

    • 53
    • 68

    Partly Sunny

    • 54
    • 65

    Mostly Cloudy

    • 52
    • 63

    Mostly Cloudy

    • 53
    • 63

    Partly Sunny

Today 17 Oct San Francisco Peninsula Coast

Partly cloudy late in the morning then becoming sunny. Highs around 70. Northwest Winds 5 to 10 Mph.

Tonight 17 Oct San Francisco Peninsula Coast

Mostly clear. Lows in the mid 50s. North Winds 5 to 10 Mph.

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Half Moon Bay - Princeton Temperature Statistics

October Temperature

Half Moon Bay Airport (0.6 miles)

  • Lowest 14 October, 2025

    42.8 °F

  • Average October

    59.4 °F

  • Highest 6 October, 2025

    71.6 °F

Climate (2020–Present)

Half Moon Bay Airport (0.6 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    60.4 °F
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