San Clemente Island - Mosquito Cove Weather Forecast

    • 66
    • 84

    Patchy Fog

    • 66
    • 85

    Mostly Sunny

    • 66
    • 84

    Mostly Sunny

    • 67
    • 84

    Mostly Sunny

    • 67
    • 85

    Mostly Sunny

    • 67
    • 85

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

Today 21 Aug Catalina and Santa Barbara Islands

Low Clouds and fog in the morning then sunny. Highs from the mid to upper 70s near the coast to the mid 80s interior.

Tonight 21 Aug Catalina and Santa Barbara Islands

Mostly clear in the evening then low Clouds and fog. Lows in the mid 60s.

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  • Temperature Real-Time

San Clemente Island - Mosquito Cove Temperature Statistics

August Temperature

San Clemente Island NALF (14.9 miles)

  • Lowest 3 August, 2026

    66 °F

  • Average August

    74.2 °F

  • Highest 14 August, 2026

    81 °F

Climate (2021–2026)

San Clemente Island NALF (14.9 miles)

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  • Average Low 2021–2026

    57.8 °F

  • Average 2021–2026

    62.3 °F

  • Average High 2021–2026

    66.7 °F
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