Farallon Islands Weather Forecast

    • 57
    • 60

    Partly Sunny

    • 57
    • 62

    Breezy

    • 57
    • 61

    Partly Sunny

    • 57
    • 61

    Mostly Cloudy

    • 57
    • 62

    Mostly Cloudy

    • 58
    • 62

    Partly Sunny

Today 28 Sep San Francisco

Partly cloudy in the morning then becoming sunny. A slight chance of drizzle in the morning. Highs in the 60s to lower 70s. Southwest Winds 5 to 15 Mph.

Tonight 28 Sep San Francisco

Mostly clear. Lows in the upper 50s. Southwest Winds 5 to 15 Mph.

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Farallon Islands Temperature Statistics

September Temperature

Half Moon Bay Airport (30.4 miles)

  • Lowest 8 September, 2026

    50 °F

  • Average September

    61 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Half Moon Bay Airport (30.4 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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