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 71%
Wind Speed S 8 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 01 Nov 07:35 PM PDT
Extended Forecast for

Mercer Island WA

Flood Watch November 1, 07:48pm until November 2, 04:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch November 1, 07:48pm until November 2, 04:00am

    NOW until 4:00am Sun

    Flood Watch

  • Tonight

    Low: 46 °F

    Rain then
    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 56. South wind 3 to 7 mph.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44. Light and variable wind.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of rain after 11am. Mostly cloudy, with a high near 56. North northeast wind 3 to 5 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 44. Calm wind becoming east southeast around 5 mph after midnight.

    Low: 44 °F

    Chance Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain. Mostly cloudy, with a high near 59.

    High: 59 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 51. Chance of precipitation is 90%.

    Low: 51 °F

    Rain

  • Wednesday

    Wednesday: Rain. Cloudy, with a high near 60.

    High: 60 °F

    Rain

Detailed Forecast

Tonight
Rain, mainly between 10pm and midnight. Low around 46. South wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Mostly sunny, with a high near 56. South wind 3 to 7 mph.
Sunday Night
Mostly cloudy, with a low around 44. Light and variable wind.
Monday
A 20 percent chance of rain after 11am. Mostly cloudy, with a high near 56. North northeast wind 3 to 5 mph.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44. Calm wind becoming east southeast around 5 mph after midnight.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 59.
Tuesday Night
Rain. Low around 51. Chance of precipitation is 90%.
Wednesday
Rain. Cloudy, with a high near 60.
Wednesday Night
Rain. Cloudy, with a low around 51.
Thursday
Rain. Cloudy, with a high near 57.
Thursday Night
Rain. Cloudy, with a low around 48.
Friday
Rain. Cloudy, with a high near 55.
Friday Night
Rain likely. Mostly cloudy, with a low around 45.
Saturday
Rain likely. Mostly cloudy, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
Last Update:
3:03 pm PDT Nov 1, 2025
Forecast Valid:
7pm PDT Nov 1, 2025-6pm PST Nov 8, 2025
 
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