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.

A Few Clouds

84°F

29°C

Humidity 70%
Wind Speed SW 10 mph
Barometer 29.88 in (1011.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 1 Jul 8:54 pm EDT
Extended Forecast for

Chelsea MA

Extreme Heat Warning July 1, 10:04pm until July 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 10:04pm until July 4, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Partly Cloudy
    then Isolated
    T-storms

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 112. West wind 6 to 9 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. West wind 5 to 7 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 104. Heat index values as high as 111. West wind 6 to 9 mph.

    High: 104 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. West wind 5 to 7 mph.

    Low: 77 °F

    Mostly Clear

  • Independence Day

    Independence Day: A slight chance of showers and thunderstorms after 3pm. Sunny and hot, with a high near 99. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70. Northwest wind 3 to 5 mph.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 83. Light and variable wind becoming east 5 to 9 mph in the morning.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Tonight
Isolated showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 112. West wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 79. West wind 5 to 7 mph.
Friday
Sunny and hot, with a high near 104. Heat index values as high as 111. West wind 6 to 9 mph.
Friday Night
Mostly clear, with a low around 77. West wind 5 to 7 mph.
Independence Day
A slight chance of showers and thunderstorms after 3pm. Sunny and hot, with a high near 99. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 70. Northwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 83. Light and variable wind becoming east 5 to 9 mph in the morning.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 67. Southeast wind 3 to 6 mph. Chance of precipitation is 40%.
Monday
A chance of showers. Partly sunny, with a high near 77. East wind 5 to 10 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 65. East wind 3 to 7 mph. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 79. Northeast wind 5 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 65. Southeast wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Mostly sunny, with a high near 82. Light southeast wind becoming east 5 to 9 mph in the morning.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chelsea MA
 42.38°N 71.04°W (Elev. 49 ft)
Last Update:
8:51 pm EDT Jul 1, 2026
Forecast Valid:
10pm EDT Jul 1, 2026-6pm EDT Jul 8, 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