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

52°F

11°C

Humidity 76%
Wind Speed NE 3 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 Jun 05:53 AM PDT
Extended Forecast for

Mercer Island WA

  • Today

    Today: Sunny, with a high near 73. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 51. North northwest wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. West wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. Southwest wind 3 to 5 mph.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 11pm. Partly cloudy, with a low around 51.

    Low: 51 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Juneteenth

    Juneteenth: A slight chance of showers after 11am. Partly sunny, with a high near 71.

    High: 71 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 73. Calm wind becoming northwest around 6 mph in the afternoon.
Tonight
Increasing clouds, with a low around 51. North northwest wind around 5 mph becoming calm in the evening.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 74. Light and variable wind.
Monday Night
Mostly clear, with a low around 52. West wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 75. Southwest wind 3 to 5 mph.
Tuesday Night
A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 57.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 72.
Wednesday Night
A slight chance of showers before 11pm. Partly cloudy, with a low around 51.
Juneteenth
A slight chance of showers after 11am. Partly sunny, with a high near 71.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 52.
Friday
Showers likely. Mostly cloudy, with a high near 66.
Friday Night
Showers likely. Mostly cloudy, with a low around 52.
Saturday
Showers likely. Mostly cloudy, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
Last Update:
3:40 am PDT Jun 15, 2025
Forecast Valid:
6am PDT Jun 15, 2025-6pm PDT Jun 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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