Harbor Island Weather Forecast

    • 61
    • 68

    Rain

    • 58
    • 73

    Chance Rain Showers

    • 58
    • 73

    Mostly Cloudy

    • 58
    • 73

    Mostly Cloudy

    • 58
    • 74

    Partly Sunny

    • 57
    • 75

    Mostly Sunny

Today 15 Aug City of Seattle

Rain at Times in the Morning, then a chance of rain in the late morning and early afternoon. Rain at Times late in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. Highs in the mid 60s to lower 70s. South wind 10 to 20 Mph with Gusts to 30 Mph.

Tonight 15 Aug City of Seattle

Rain until early Morning, then cloudy with a slight chance of rain in the morning. Rainfall Amounts a half inch to one inch possible. Lows near 60. South wind 10 to 20 Mph with Gusts to 30 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

August Temperature

Boeing Field - King County International Airport (2.5 miles)

  • Lowest 8 August, 2025

    56.6 °F

  • Average August

    70.3 °F

  • Highest 12 August, 2025

    90 °F

Climate (2020–Present)

Boeing Field - King County International Airport (2.5 miles)

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

  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    61.4 °F
Get WillyWeather+ to remove ads