Areas of Severe Thunderstorms and Excessive Rainfall Today

Scattered severe thunderstorms capable of damaging wind gusts and some hail are expected this afternoon and evening from the Upper Ohio River Valley into the Northeast, and from the Appalachians into the Mid-Atlantic States. Excessive rainfall from heavy thunderstorms may produce areas of flash flooding from southern New Mexico into the western and northern Gulf Coast into Wednesday. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

81°F

27°C

Humidity 34%
Wind Speed NW 5 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Jun 12:00 PM PDT
Extended Forecast for

Mercer Island WA

Heat Advisory until June 16, 05:00am
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until June 16, 05:00am

    NOW until 5:00am Tue

    Heat Advisory

  • This Afternoon

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 62. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 87. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 87 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. East northeast wind 3 to 8 mph.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 87. North wind around 9 mph.
Tonight
Partly cloudy, with a low around 62. North wind 5 to 7 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 87. Calm wind becoming north northwest around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 61. East northeast wind 3 to 8 mph.
Tuesday
Sunny, with a high near 76. Light and variable wind becoming northwest around 6 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Clear, with a low around 56.
Thursday
Sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 58.
Juneteenth
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 77.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
11:26 am PDT Jun 14, 2026
12pm PDT Jun 14, 2026-6pm PDT Jun 20, 2026
 
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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