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

Dangerous Heat Wave Continues; Enhanced Area of Severe Thunderstorms Today

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Widespread moderate to extreme HeatRisk is forecast. Scattered wind damage and large hail are expected from severe thunderstorms impacting parts of Nebraska into Iowa today. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Mostly Cloudy

70°F

21°C

Humidity 56%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 03 Jul 01:35 PM PDT
Extended Forecast for

Mercer Island WA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 75. Light southwest wind.

    High: 75 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Independence Day

    Independence Day: Cloudy through mid morning, then gradual clearing, with a high near 74. Light and variable wind becoming southwest around 5 mph in the afternoon.

    High: 74 °F

    Gradual
    Clearing

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54. North northeast wind 5 to 8 mph.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. North wind 5 to 9 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 75. Light southwest wind.
Tonight
Mostly cloudy, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.
Independence Day
Cloudy through mid morning, then gradual clearing, with a high near 74. Light and variable wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 54. North northeast wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 74. North wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 55.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 72.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
11:26 am PDT Jul 3, 2026
Forecast Valid:
1pm PDT Jul 3, 2026-6pm PDT Jul 9, 2026
 
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Additional Resources

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