National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Boeing Field - King County International Airport (KBFI)

Lat: 47.54548°NLon: 122.3147°WElev: 20.0ft.

Clear

66°F

19°C

Humidity 63%
Wind Speed WNW 5 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 14 Oct 04:30 PM PDT
Extended Forecast for

Mercer Island WASimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 49. Light north northeast wind.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71. Light and variable wind.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. Light east wind.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 74. Calm wind.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 56. Light south southwest wind becoming south 6 to 11 mph after midnight. Winds could gust as high as 21 mph.

    Low: 56 °F

    Chance Rain

  • Saturday

    Saturday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Rain Likely
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 49. Light north northeast wind.
Thursday
Sunny, with a high near 71. Light and variable wind.
Thursday Night
Mostly clear, with a low around 52. Light east wind.
Friday
Mostly sunny, with a high near 74. Calm wind.
Friday Night
A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 56. Light south southwest wind becoming south 6 to 11 mph after midnight. Winds could gust as high as 21 mph.
Saturday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 57.
Monday Night
A chance of rain. Mostly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 58.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
A slight chance of rain. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WASimilar City Names
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
12:50 pm PDT Oct 14, 2026
Forecast Valid:
4pm PDT Oct 14, 2026-6pm PDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation