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

Areas of Dangerous Heat and Heavy Rainfall Today

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

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

Clear

66°F

19°C

Humidity 63%
Wind Speed WNW 8 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Sep 02:35 PM PDT
Extended Forecast for

Seatac WA

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. North northwest wind around 6 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 71. Light and variable wind.

    High: 71 °F

    Partly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 54. Calm wind.

    Low: 54 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 69. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 69 °F

    Mostly Cloudy

  • Tuesday Night

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

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 62.

    High: 62 °F

    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 69. North northwest wind around 6 mph.
Tonight
Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 71. Light and variable wind.
Monday Night
Increasing clouds, with a low around 54. Calm wind.
Tuesday
Mostly cloudy, with a high near 69. Calm wind becoming south southwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Partly sunny, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 62.
Thursday Night
Rain likely. Cloudy, with a low around 51.
Friday
A chance of rain. Mostly cloudy, with a high near 62.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Seatac WA
 47.44°N 122.3°W (Elev. 358 ft)
Last Update:
1:05 pm PDT Sep 20, 2026
Forecast Valid:
2pm PDT Sep 20, 2026-6pm PDT Sep 26, 2026
 
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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