San Clemente Island - Northwest Harbor Weather Forecast

    • 51
    • 58

    Mostly Cloudy

    • 52
    • 58

    Partly Sunny

    • 53
    • 60

    Mostly Cloudy

    • 53
    • 60

    Patchy Fog

    • 53
    • 60

    Mostly Cloudy

    • 53
    • 61

    Chance Rain Showers

Today 30 Jan Catalina and Santa Barbara Islands

Sunny after morning low Clouds. Highs in the 50s.

Tonight 30 Jan Catalina and Santa Barbara Islands

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

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San Clemente Island - Northwest Harbor Temperature Statistics

January Temperature

San Clemente Island NALF (0.6 miles)

  • Lowest 27 January, 2025

    50 °F

  • Average January

    60 °F

  • Highest 23 January, 2025

    70 °F

Climate (2020–Present)

San Clemente Island NALF (0.6 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    61.4 °F

  • Average High 2020–2025

    66.3 °F
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