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

Severe Thunderstorm and Tropical Storm Bertha Impacts

Numerous severe thunderstorms are expected across a broad region from the Ohio Valley to the Mid-Atlantic and Northeast States today into tonight. Swaths of damaging wind gusts are expected and some tornadoes are possible. Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the Florida Panhandle westward to southeastern Louisiana later today and Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

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

Clear

81°F

27°C

Humidity 44%
Wind Speed WNW 5 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 21 Jul 12:00 PM PDT
Extended Forecast for

Seattle-Tacoma International Airport WA

Heat Advisory until July 22, 11:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 22, 11:00pm

    NOW until 11:00pm Wed

    Heat Advisory

  • This Afternoon

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 65. North northeast wind 3 to 8 mph.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 94. Light and variable wind becoming northwest 5 to 9 mph in the morning.

    High: 94 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 65. North wind 6 to 11 mph becoming south southwest after midnight.

    Low: 65 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain before 11am. Mostly sunny, with a high near 81. South southwest wind around 11 mph.

    High: 81 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 92. Northwest wind around 8 mph.
Tonight
Mostly clear, with a low around 65. North northeast wind 3 to 8 mph.
Wednesday
Increasing clouds, with a high near 94. Light and variable wind becoming northwest 5 to 9 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 65. North wind 6 to 11 mph becoming south southwest after midnight.
Thursday
A 20 percent chance of rain before 11am. Mostly sunny, with a high near 81. South southwest wind around 11 mph.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 59.
Saturday
Partly sunny, with a high near 72.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Partly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Seattle-Tacoma International Airport WA
 47.46°N 122.31°W (Elev. 400 ft)
Last Update:
11:26 am PDT Jul 21, 2026
Forecast Valid:
12pm PDT Jul 21, 2026-6pm PDT Jul 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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