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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Boeing Field - King County International Airport (KBFI)

Lat: 47.54548°NLon: 122.3147°WElev: 20.0ft.

Clear

59°F

15°C

Humidity 58%
Wind Speed SW 12 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 20 Mar 04:30 PM PDT
Extended Forecast for

South Seattle WA

Flood Watch March 20, 04:55pm until March 21, 05:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch March 20, 04:55pm until March 21, 05:00pm

    NOW until 5:00pm Sat

    Flood Watch

  • This Afternoon

    High: 57 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. South southwest wind 6 to 10 mph becoming north northeast after midnight.

    Low: 41 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 50. Light north wind.

    High: 50 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain before 2am, then a slight chance of rain and snow. Partly cloudy, with a low around 38. Light and variable wind becoming south around 6 mph after midnight. Chance of precipitation is 20%.

    Low: 38 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 53. West southwest wind around 6 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 53 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of rain after 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 57. South southwest wind around 13 mph.
Tonight
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. South southwest wind 6 to 10 mph becoming north northeast after midnight.
Saturday
A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 50. Light north wind.
Saturday Night
A slight chance of rain before 2am, then a slight chance of rain and snow. Partly cloudy, with a low around 38. Light and variable wind becoming south around 6 mph after midnight. Chance of precipitation is 20%.
Sunday
A chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 53. West southwest wind around 6 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Mostly cloudy, with a high near 54.
Monday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 42.
Tuesday
Rain. Cloudy, with a high near 54.
Tuesday Night
Rain. Mostly cloudy, with a low around 42.
Wednesday
Rain. Mostly cloudy, with a high near 52.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A slight chance of rain. Mostly sunny, with a high near 53.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Seattle WA
 47.55°N 122.3°W (Elev. 200 ft)
Last Update:
11:27 am PDT Mar 20, 2026
Forecast Valid:
4pm PDT Mar 20, 2026-6pm PDT Mar 27, 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