Half Moon Bay - Princeton Weather Forecast

    • 49
    • 63

    Areas Fog

    • 51
    • 62

    Mostly Cloudy

    • 49
    • 61

    Slight Chance Rain

    • 49
    • 62

    Partly Sunny

    • 49
    • 64

    Partly Sunny

    • 49
    • 64

    Partly Sunny

Today 11 May San Francisco Peninsula Coast

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the upper 60s. Southwest Winds 5 to 10 Mph.

Tonight 11 May San Francisco Peninsula Coast

Mostly cloudy. Lows in the lower 50s. West Winds 5 to 10 Mph.

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Half Moon Bay - Princeton Temperature Statistics

May Temperature

Half Moon Bay Airport (0.6 miles)

  • Lowest 4 May, 2026

    51.8 °F

  • Average May

    55.4 °F

  • Highest 6 May, 2026

    62.6 °F

Climate (2021–Present)

Half Moon Bay Airport (0.6 miles)

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  • Average Low 2021–2026

    48.5 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    60.9 °F
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