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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

SEATTLE WEATHER FORECAST OFFICE (SEAW1)

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

NA

75°F

24°C

Humidity 51%
Wind Speed SSW 5 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 56°F (13°C)
Visibility NA
Last update 27 Aug 05:30 PM PDT
Extended Forecast for

3 Miles NW Sammamish WA

  • Tonight

    Tonight: Increasing clouds, with a low around 56. Southwest wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 73. Calm wind.

    High: 73 °F

    Partly Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after midnight. Cloudy, with a low around 54. Light and variable wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Chance Rain
    then Rain
    Likely

  • Saturday

    Saturday: Rain before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of rain after 2pm. High near 70. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 71.

    High: 71 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 56. Southwest wind around 6 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 73. Calm wind.
Friday Night
Rain likely, mainly after midnight. Cloudy, with a low around 54. Light and variable wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of rain after 2pm. High near 70. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 52. Calm wind.
Sunday
Mostly cloudy, with a high near 71.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Partly sunny, with a high near 73.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 72.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 54.
Wednesday
Rain likely. Mostly cloudy, with a high near 68.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 53.
Thursday
A chance of rain. Mostly cloudy, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sammamish WA
 47.64°N 122.08°W (Elev. 200 ft)
Last Update:
12:56 pm PDT Aug 27, 2026
Forecast Valid:
6pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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