Gulf of the Farallones Marine Sanctuary Weather Forecast

    • 52
    • 56

    Increasing Clouds

    • 53
    • 56

    Mostly Cloudy

    • 52
    • 56

    Mostly Cloudy

    • 53
    • 56

    Breezy

    • 53
    • 57

    Breezy

    • 54
    • 59

    Mostly Sunny

Today 22 May San Francisco Peninsula Coast

Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 60s. South Winds 5 to 10 Mph.

Tonight 22 May San Francisco Peninsula Coast

Mostly cloudy. Lows around 50. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gulf of the Farallones Marine Sanctuary Temperature Statistics

May Temperature

Half Moon Bay Airport (11.8 miles)

  • Lowest 19 May, 2026

    42.8 °F

  • Average May

    55.3 °F

  • Highest 18 May, 2026

    73.4 °F

Climate (2021–Present)

Half Moon Bay Airport (11.8 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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