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.

Partly Cloudy

70°F

21°C

Humidity 87%
Wind Speed SW 9 mph
Barometer 30.10 in (1019.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 13 Jul 11:54 pm EDT
Extended Forecast for

Chelsea MA

  • Overnight

    Overnight: Patchy fog between 4am and 5am. Otherwise, cloudy, with a low around 68. South wind 3 to 5 mph.

    Low: 68 °F

    Patchy Fog

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. Southeast wind 5 to 8 mph. Chance of precipitation is 30%.

    High: 85 °F

    Patchy Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Mostly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. South wind around 6 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72. Southwest wind 3 to 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 91. South wind 3 to 7 mph.

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 75. Southwest wind around 7 mph.

    Low: 75 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 4pm. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog between 4am and 5am. Otherwise, cloudy, with a low around 68. South wind 3 to 5 mph.
Monday
A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. Southeast wind 5 to 8 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Mostly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. South wind around 6 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 72. Southwest wind 3 to 5 mph.
Wednesday
Mostly sunny and hot, with a high near 91. South wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 75. Southwest wind around 7 mph.
Thursday
A chance of showers and thunderstorms after 4pm. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 91. West wind 6 to 9 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. West wind around 6 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 83. North wind 6 to 8 mph becoming east in the afternoon.
Saturday Night
Mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming light and variable after midnight.
Sunday
Partly sunny, with a high near 81. North wind 5 to 8 mph becoming southeast in the afternoon.
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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:
6:05 pm EDT Jul 13, 2025
Forecast Valid:
12am EDT Jul 14, 2025-6pm EDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

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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