Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

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

Mostly Cloudy

65°F

18°C

Humidity 70%
Wind Speed W 5 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 19 Aug 10:53 AM PDT
Extended Forecast for

Seatac WA

  • Today

    Today: Mostly sunny, with a high near 78. Southwest wind around 5 mph becoming northwest in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. North northwest wind around 5 mph becoming calm  after midnight.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 81 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 59. North northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 59 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 81 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain.  Mostly cloudy, with a high near 70.

    High: 70 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 78. Southwest wind around 5 mph becoming northwest in the afternoon.
Tonight
Partly cloudy, with a low around 58. North northwest wind around 5 mph becoming calm after midnight.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 59. North northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 58.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 70.
Saturday Night
Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 56.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Seatac WA
 47.44°N 122.3°W (Elev. 358 ft)
11:26 pm PDT Aug 18, 2026
11am PDT Aug 19, 2026-6pm PDT Aug 25, 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