Half Moon Bay - Pillar Point Harbor Weather Forecast

    • 55
    • 63

    Mostly Cloudy

    • 54
    • 63

    Mostly Cloudy

    • 56
    • 70

    Mostly Cloudy

    • 57
    • 68

    Mostly Cloudy

    • 55
    • 66

    Mostly Cloudy

    • 54
    • 65

    Partly Sunny

    • 54
    • 64

    Partly Sunny

Today 21 Sep San Francisco Peninsula Coast

Partly cloudy. Highs in the lower 70s.

Tonight 21 Sep San Francisco Peninsula Coast

Cloudy. Patchy fog after midnight. Lows in the mid 50s. West Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Half Moon Bay - Pillar Point Harbor Temperature Statistics

September Temperature

Half Moon Bay Airport (1.2 miles)

  • Lowest 8 September, 2026

    50 °F

  • Average September

    61.7 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Half Moon Bay Airport (1.2 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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