San Clemente Island - Mosquito Cove Weather Forecast

    • 56
    • 68

    Mostly Sunny

    • 57
    • 73

    Mostly Sunny

    • 56
    • 73

    Partly Sunny

    • 57
    • 69

    Partly Sunny

    • 56
    • 68

    Patchy Fog

    • 55
    • 68

    Patchy Fog

Today 14 Dec Catalina and Santa Barbara Islands

Low Clouds and dense fog. Fog locally dense with visibility one quarter mile or less. Highs from the mid 50s to around 60 near the coast to the mid 60s to around 70 interior.

Tonight 14 Dec Catalina and Santa Barbara Islands

Mostly clear. Lows in the upper 30s to mid 40s except the mid 50s to around 60 in the Hills.

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San Clemente Island - Mosquito Cove Temperature Statistics

December Temperature

San Clemente Island NALF (14.9 miles)

  • Lowest 2 December, 2025

    50 °F

  • Average December

    63 °F

  • Highest 9 December, 2025

    70 °F

Climate (2020–Present)

San Clemente Island NALF (14.9 miles)

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  • Average Low 2020–2025

    56.9 °F

  • Average 2020–2025

    61.3 °F

  • Average High 2020–2025

    66 °F
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