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.

Overcast

57°F

14°C

Humidity 67%
Wind Speed SE 5 MPH
Barometer 30.25 in (1024.38 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 14 Oct 04:00 AM PDT
Extended Forecast for

Mercer Island WA

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 65. South southeast wind around 5 mph becoming calm in the morning.

    High: 65 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Increasing clouds, with a low around 52. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 52 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 69. North northeast wind 3 to 5 mph.

    High: 69 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Light and variable wind.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 72. Light and variable wind.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.

    High: 62 °F

    Rain Likely
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 65. South southeast wind around 5 mph becoming calm in the morning.
Tonight
Increasing clouds, with a low around 52. Calm wind becoming north northeast around 5 mph after midnight.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 69. North northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 54. Light and variable wind.
Friday
Mostly sunny, with a high near 72. Light and variable wind.
Friday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 57.
Saturday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 59.
Sunday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 48.
Monday
A chance of rain. Mostly cloudy, with a high near 58.
Monday Night
A chance of rain. Mostly cloudy, with a low around 48.
Tuesday
A slight chance of rain. Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.55°N 122.24°W (Elev. 3 ft)
Last Update:
12:30 am PDT Oct 14, 2026
Forecast Valid:
4am PDT Oct 14, 2026-6pm PDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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