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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

Lat: 47.44472°NLon: 122.31361°WElev: 427.0ft.

Partly Cloudy

65°F

18°C

Humidity 62%
Wind Speed SSW 8 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Sep 01:53 PM PDT
Extended Forecast for

Vashon WA

  • This Afternoon

    This Afternoon: Sunny, with a high near 68. South southwest wind 5 to 7 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Light southwest wind.

    Low: 53 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 53. North wind 3 to 6 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 68. Calm wind becoming north around 6 mph in the afternoon.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Monday Night

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

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 68. South southwest wind 5 to 7 mph.
Tonight
Increasing clouds, with a low around 53. Light southwest wind.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 68. Light and variable wind.
Saturday Night
Increasing clouds, with a low around 53. North wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 68. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 52.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vashon WA
 47.46°N 122.47°W (Elev. 381 ft)
Last Update:
1:27 pm PDT Sep 18, 2026
Forecast Valid:
2pm PDT Sep 18, 2026-6pm PDT Sep 24, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation