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

Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

73°F

23°C

Humidity 49%
Wind Speed NNW 6 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 30 Jul 11:05 AM PDT
Extended Forecast for

Mercer Island WA

  • Today

    Today: Sunny, with a high near 85. Northwest wind 5 to 7 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. North wind 5 to 7 mph becoming east northeast after midnight.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 82. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 82 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 62. North wind around 5 mph becoming light and variable in the evening.

    Low: 62 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 76. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 76 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Northwest wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 61. North wind 5 to 7 mph becoming east northeast after midnight.
Thursday
Partly sunny, with a high near 82. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 62. North wind around 5 mph becoming light and variable in the evening.
Friday
A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 76. Calm wind becoming northwest around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Partly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Mostly cloudy, with a low around 57.
Monday
A slight chance of showers. Mostly cloudy, with a high near 72.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 58.
Tuesday
A slight chance of showers. Partly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.56°N 122.21°W (Elev. 121 ft)
Last Update:
10:55 am PDT Jul 30, 2025
Forecast Valid:
11am PDT Jul 30, 2025-6pm PDT Aug 5, 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