San Clemente Island - Northwest Harbor Weather Forecast

    • 59
    • 67

    Mostly Sunny

    • 60
    • 67

    Partly Sunny

    • 59
    • 67

    Patchy Fog

    • 59
    • 68

    Mostly Cloudy

    • 59
    • 67

    Mostly Cloudy

    • 59
    • 66

    Mostly Cloudy

Today 15 Jun Catalina and Santa Barbara Islands

Sunny. Highs upper 60s and 70s.

Tonight 15 Jun Catalina and Santa Barbara Islands

Clear. Lows around 60.

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San Clemente Island - Northwest Harbor Temperature Statistics

June Temperature

San Clemente Island NALF (0.6 miles)

  • Lowest 2 June, 2025

    57 °F

  • Average June

    61.1 °F

  • Highest 1 June, 2025

    70 °F

Climate (2020–Present)

San Clemente Island NALF (0.6 miles)

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  • Average Low 2020–2025

    56.9 °F

  • Average 2020–2025

    61.4 °F

  • Average High 2020–2025

    66.2 °F
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