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

48°F

9°C

Humidity 87%
Wind Speed SSE 5 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 02 Nov 06:20 AM PST
Extended Forecast for

Mercer Island WA

  • Today

    Today: A 20 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 5 to 8 mph.

    High: 55 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Tonight

    Tonight: A 10 percent chance of rain after 4am. Cloudy, with a low around 45. Calm wind becoming north around 6 mph after midnight.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Monday

    Monday: A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53. North northeast wind 3 to 6 mph.

    High: 53 °F

    Chance Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 46. Calm wind becoming east around 6 mph in the evening.

    Low: 46 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 55. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 51. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 51 °F

    Rain

  • Wednesday

    Wednesday: Rain. High near 57. Chance of precipitation is 100%.

    High: 57 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Cloudy, with a low around 51.

    Low: 51 °F

    Rain

  • Thursday

    Thursday: Rain. Cloudy, with a high near 55.

    High: 55 °F

    Rain

Detailed Forecast

Today
A 20 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 5 to 8 mph.
Tonight
A 10 percent chance of rain after 4am. Cloudy, with a low around 45. Calm wind becoming north around 6 mph after midnight.
Monday
A 30 percent chance of rain, mainly after 10am. Mostly cloudy, with a high near 53. North northeast wind 3 to 6 mph.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 46. Calm wind becoming east around 6 mph in the evening.
Tuesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 55. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain. Low around 51. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain. High near 57. Chance of precipitation is 100%.
Wednesday Night
Rain. Cloudy, with a low around 51.
Thursday
Rain. Cloudy, with a high near 55.
Thursday Night
Rain. Cloudy, with a low around 50.
Friday
Rain. Mostly cloudy, with a high near 54.
Friday Night
Rain likely. Mostly cloudy, with a low around 46.
Saturday
A chance of rain. Mostly cloudy, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
Last Update:
3:16 am PST Nov 2, 2025
Forecast Valid:
6am PST Nov 2, 2025-6pm PST Nov 8, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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