San Clemente Island - Northwest Harbor Weather Forecast

    • 58
    • 66

    Rain Showers

    • 56
    • 66

    Rain Showers

    • 57
    • 64

    Rain Showers Likely

    • 54
    • 65

    Rain Showers

    • 56
    • 64

    Chance Rain Showers

    • 57
    • 65

    Chance Rain Showers

    • 56
    • 65

    Chance Rain Showers

Today 14 Nov Catalina and Santa Barbara Islands

Showers in the Morning, then a chance of Showers in the afternoon. Highs from the upper 50s near the coast to the upper 60s interior. South Winds 15 to 25 Mph in the afternoon.

Tonight 14 Nov Catalina and Santa Barbara Islands

Showers with a slight chance of Thunderstorms. Lows around 60.

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San Clemente Island - Northwest Harbor Temperature Statistics

November Temperature

San Clemente Island NALF (0.6 miles)

  • Lowest 4 November, 2025

    55.4 °F

  • Average November

    60.9 °F

  • Highest 8 November, 2025

    69.1 °F

Climate (2020–Present)

San Clemente Island NALF (0.6 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    61.2 °F

  • Average High 2020–2025

    66 °F
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