San Juan Island - Kanaka Bay Weather Forecast

    • 45
    • 60

    Increasing Clouds

    • 48
    • 64

    Chance Rain

    • 42
    • 60

    Slight Chance Rain

    • 43
    • 57

    Mostly Cloudy

    • 43
    • 57

    Mostly Cloudy

    • 43
    • 57

    Partly Sunny

Today 15 Oct San Juan County

Mostly sunny. Highs in the mid 50s to lower 60s. Light wind.

Tonight 15 Oct San Juan County

Partly cloudy. Lows in the 40s to lower 50s. Light wind.

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San Juan Island - Kanaka Bay Temperature Statistics

October Temperature

Friday Harbor Airport (3.1 miles)

  • Lowest 12 October, 2026

    41 °F

  • Average October

    53.5 °F

  • Highest 2 October, 2026

    66 °F

Climate (2021–2026)

Friday Harbor Airport (3.1 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    59.7 °F
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