Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Current conditions at

SEATTLE WEATHER FORECAST OFFICE (SEAW1)

Lat: 47.68528°NLon: 122.25111°WElev: 29.0ft.

NA

69°F

21°C

Humidity 72%
Wind Speed WSW 1 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 60°F (16°C)
Visibility NA
Last update 27 Jul 09:30 PM PDT
Extended Forecast for

3 Miles NW Sammamish WA

  • Tonight

    Tonight: Increasing clouds, with a low around 58. Calm wind becoming south around 6 mph after midnight.

    Low: 58 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 77. Southwest wind 7 to 9 mph.

    High: 77 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 58. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 77. Southwest wind 7 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 77. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 78.
Saturday Night
A chance of rain. Partly cloudy, with a low around 55.
Sunday
A slight chance of rain. Partly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sammamish WA
 47.64°N 122.08°W (Elev. 200 ft)
12:46 pm PDT Jul 27, 2026
10pm PDT Jul 27, 2026-6pm PDT Aug 3, 2026
 
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Additional Resources

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