Harbor Island Weather Forecast

    • 47
    • 61

    Chance Rain

    • 47
    • 58

    Mostly Cloudy

    • 46
    • 58

    Mostly Cloudy

    • 45
    • 58

    Mostly Sunny

    • 46
    • 60

    Partly Sunny

    • 46
    • 57

    Chance Rain

Today 17 Oct City of Seattle

Cloudy with a chance of Showers in the Morning, then partly sunny in the afternoon. Highs near 60. South wind 10 to 15 Mph with Gusts to 25 Mph in the morning becoming light.

Tonight 17 Oct City of Seattle

Partly cloudy. Lows in the 40s. Light wind.

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Harbor Island Temperature Statistics

October Temperature

Boeing Field - King County International Airport (2.5 miles)

  • Lowest 12 October, 2026

    37.9 °F

  • Average October

    57.1 °F

  • Highest 2 October, 2026

    72 °F

Climate (2021–2026)

Boeing Field - King County International Airport (2.5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    61.7 °F
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