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

Hazardous Weather Conditions

Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

Partly Cloudy

68°F

20°C

Humidity 87%
Wind Speed SW 10 mph
Barometer 29.87 in (1011.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 20 May 5:54 am EDT
Extended Forecast for

Chelsea MA

Heat Advisory May 20, 06:28am until May 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory May 20, 06:28am until May 20, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Today

    High: 90 °F

    Mostly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 55. North wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 66. North wind 5 to 7 mph becoming east in the afternoon.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67. Calm wind becoming east 5 to 8 mph in the morning.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 3am. Mostly cloudy, with a low around 50. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly cloudy, with a high near 62. Calm wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 40%.

    High: 62 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 48. East wind 3 to 5 mph. Chance of precipitation is 50%.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers, mainly between 2pm and 4pm. Mostly sunny and hot, with a high near 90. West wind 7 to 14 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 55. North wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 66. North wind 5 to 7 mph becoming east in the afternoon.
Thursday Night
Partly cloudy, with a low around 49. Light and variable wind.
Friday
Mostly sunny, with a high near 67. Calm wind becoming east 5 to 8 mph in the morning.
Friday Night
A slight chance of showers after 3am. Mostly cloudy, with a low around 50. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.
Saturday
A chance of showers. Mostly cloudy, with a high near 62. Calm wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 48. East wind 3 to 5 mph. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly cloudy, with a high near 61. East wind 6 to 10 mph. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 49. East wind 3 to 6 mph. Chance of precipitation is 50%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 66. North wind 5 to 8 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 71. Calm wind becoming northeast 5 to 7 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chelsea MA
 42.4°N 71.03°W (Elev. 49 ft)
Last Update:
1:01 am EDT May 20, 2026
Forecast Valid:
6am EDT May 20, 2026-6pm EDT May 26, 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