Santa Catalina Island - Avalon Bay Weather Forecast

    • 66
    • 83

    Mostly Cloudy

    • 67
    • 83

    Mostly Cloudy

    • 67
    • 81

    Partly Sunny

    • 69
    • 76

    Partly Sunny

    • 69
    • 77

    Partly Sunny

    • 69
    • 77

    Partly Sunny

Today 20 Sep Catalina and Santa Barbara Islands

Low Clouds and fog clearing to the Beaches in the afternoon. Highs in the 70s.

Tonight 20 Sep Catalina and Santa Barbara Islands

Low Clouds and fog. Lows in the mid 50s to lower 60s.

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Santa Catalina Island - Avalon Bay Temperature Statistics

September Temperature

San Clemente Island NALF (26.7 miles)

  • Lowest 1 September, 2026

    66.9 °F

  • Average September

    74.9 °F

  • Highest 9 September, 2026

    87.1 °F

Climate (2021–2026)

San Clemente Island NALF (26.7 miles)

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  • Average Low 2021–2026

    57.9 °F

  • Average 2021–2026

    62.4 °F

  • Average High 2021–2026

    66.8 °F
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