San Juan Island - Friday Harbor Weather Forecast

    • 43
    • 58

    Mostly Sunny

    • 44
    • 58

    Sunny

    • 43
    • 59

    Mostly Sunny

    • 46
    • 57

    Rain Likely

    • 45
    • 58

    Chance Rain

    • 46
    • 57

    Rain

    • 44
    • 58

    Rain

Today 13 Oct San Juan County

Windy, sunny. Highs in the mid 50s to lower 60s. North wind 15 to 30 Mph. Gusts to 40 Mph.

Tonight 13 Oct San Juan County

Mostly clear. Lows in the 40s. North wind 10 to 20 Mph.

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San Juan Island - Friday Harbor Temperature Statistics

October Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 5 October, 2025

    44.1 °F

  • Average October

    53.4 °F

  • Highest 5 October, 2025

    64.9 °F

Climate (2020–Present)

Friday Harbor Airport (1.9 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.6 °F
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