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

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

Fair

69°F

21°C

Humidity 53%
Wind Speed Calm
Barometer 30.16 in (1021.3 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 16 Aug 12:54 am EDT
Extended Forecast for

Chelsea MA

  • Overnight

    Overnight: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 80. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers, mainly after 4am. Increasing clouds, with a low around 67. South wind 6 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. Patchy fog before 9am. High near 79. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: A chance of showers, mainly before 9pm. Mostly cloudy, with a low around 66. Light north wind. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. North wind 5 to 7 mph becoming northeast in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Light and variable wind.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. Southwest wind around 6 mph.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 62. Calm wind.
Sunday
Mostly sunny, with a high near 80. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Sunday Night
A chance of showers, mainly after 4am. Increasing clouds, with a low around 67. South wind 6 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers, with thunderstorms also possible after 2pm. Patchy fog before 9am. High near 79. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers, mainly before 9pm. Mostly cloudy, with a low around 66. Light north wind. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 81. North wind 5 to 7 mph becoming northeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 65. Light and variable wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming south 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 68. Southwest wind around 6 mph.
Thursday
A chance of showers. Partly sunny, with a high near 83. West wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 63. Northwest wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 78. North wind 6 to 9 mph becoming east in the afternoon.
Friday Night
Partly cloudy, with a low around 61. Light and variable wind.
Saturday
Mostly sunny, with a high near 78. East wind 5 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chelsea MA
 42.4°N 71.03°W (Elev. 49 ft)
Last Update:
3:23 pm EDT Aug 15, 2026
Forecast Valid:
1am EDT Aug 16, 2026-6pm EDT Aug 22, 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