Harbor Island Weather Forecast

    • 58
    • 73

    Increasing Clouds

    • 57
    • 75

    Partly Sunny

    • 59
    • 76

    Mostly Sunny

    • 63
    • 81

    Partly Sunny

    • 63
    • 85

    Partly Sunny

    • 63
    • 84

    Partly Sunny

Today 17 Jul City of Seattle

Mostly cloudy in the morning then becoming mostly sunny. Highs in the lower to mid 70s. South wind around 10 Mph becoming southwest to 10 Mph in the afternoon.

Tonight 17 Jul City of Seattle

Mostly clear in the evening then becoming mostly cloudy. Lows in the mid to upper 50s. Northwest wind to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

July Temperature

Boeing Field - King County International Airport (2.5 miles)

  • Lowest 1 July, 2026

    55 °F

  • Average July

    65.5 °F

  • Highest 14 July, 2026

    82.9 °F

Climate (2021–2026)

Boeing Field - King County International Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    61.6 °F
Get WillyWeather+ to remove ads