Lopez Island - Swifts Bay Weather Forecast

    • 55
    • 70

    Mostly Sunny

    • 57
    • 74

    Mostly Sunny

    • 60
    • 75

    Mostly Sunny

    • 56
    • 74

    Mostly Sunny

    • 54
    • 68

    Mostly Cloudy

    • 55
    • 67

    Partly Sunny

    • 54
    • 67

    Mostly Cloudy

Today 9 Aug San Juan County

Mostly sunny. Highs in the upper 60s to mid 70s. Light wind.

Tonight 9 Aug San Juan County

Mostly clear. Lows in the mid 50s to lower 60s. Light wind.

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Lopez Island - Swifts Bay Temperature Statistics

August Temperature

Friday Harbor Airport (7.5 miles)

  • Lowest 7 August, 2025

    50 °F

  • Average August

    60.1 °F

  • Highest 2 August, 2025

    71.1 °F

Climate (2020–Present)

Friday Harbor Airport (7.5 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.5 °F
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