San Clemente Island - Northwest Harbor Weather Forecast

    • 56
    • 60

    Increasing Clouds

    • 58
    • 62

    Mostly Sunny

    • 58
    • 64

    Partly Sunny

    • 59
    • 65

    Partly Sunny

    • 59
    • 64

    Mostly Cloudy

    • 59
    • 65

    Partly Sunny

Today 21 Feb Catalina and Santa Barbara Islands

Sunny. Highs in the upper 50s to mid 60s.

Tonight 21 Feb Catalina and Santa Barbara Islands

Partly cloudy. Lows in the lower 50s.

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San Clemente Island - Northwest Harbor Temperature Statistics

February Temperature

San Clemente Island NALF (0.6 miles)

  • Lowest 19 February, 2026

    50 °F

  • Average February

    63.1 °F

  • Highest 4 February, 2026

    77 °F

Climate (2021–Present)

San Clemente Island NALF (0.6 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    61.6 °F

  • Average High 2021–2026

    66.2 °F
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