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

Hazardous Weather Conditions

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Partly Cloudy

52°F

11°C

Humidity 62%
Wind Speed SE 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 09 Dec 02:35 PM PST
Extended Forecast for

Mercer Island WA

Flood Watch December 9, 02:45pm until December 12, 04:00pm
Wind Advisory December 9, 08:00pm until December 10, 10:00pm
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 9, 02:45pm until December 12, 04:00pm

    NOW until 4:00pm Fri

    Flood Watch

  • This Afternoon

    High: 52 °F

    Rain

  • Tonight

    Tonight: Rain. Temperature rising to around 56 by 3am. South wind 9 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F⇑

    Rain

  • Wednesday

    Wednesday: Rain. High near 58. South southwest wind 16 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Low around 50. South southwest wind 9 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain

  • Thursday

    Thursday: Rain. High near 54. East southeast wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 54 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain Likely

  • Friday

    Friday: A 50 percent chance of rain. Cloudy, with a high near 54.

    High: 54 °F

    Chance Rain

  • Friday Night

    Friday Night: A chance of rain, mainly before 4am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

Detailed Forecast

This Afternoon
Rain, mainly after 3pm. High near 52. Light east wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain. Temperature rising to around 56 by 3am. South wind 9 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain. High near 58. South southwest wind 16 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain. Low around 50. South southwest wind 9 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain. High near 54. East southeast wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 50 percent chance of rain. Cloudy, with a high near 54.
Friday Night
A chance of rain, mainly before 4am. Mostly cloudy, with a low around 48.
Saturday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 55.
Saturday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 53.
Sunday Night
Rain. Mostly cloudy, with a low around 47.
Monday
Rain. Cloudy, with a high near 56.
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 122.22°W (Elev. 118 ft)
Last Update:
1:26 pm PST Dec 9, 2025
Forecast Valid:
2pm PST Dec 9, 2025-6pm PST Dec 15, 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