San Juan Island - Kanaka Bay Weather Forecast

    • 42
    • 54

    Mostly Cloudy

    • 47
    • 60

    Mostly Cloudy

    • 48
    • 62

    Mostly Cloudy

    • 48
    • 63

    Mostly Cloudy

    • 46
    • 60

    Chance Rain

    • 43
    • 58

    Partly Sunny

Today 17 Apr San Juan County

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

Tonight 17 Apr San Juan County

Mostly cloudy. Lows in the lower to mid 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Kanaka Bay Temperature Statistics

April Temperature

Friday Harbor Airport (3.1 miles)

  • Lowest 15 April, 2026

    33.1 °F

  • Average April

    47.9 °F

  • Highest 5 April, 2026

    62.1 °F

Climate (2021–Present)

Friday Harbor Airport (3.1 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
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