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.

Mostly Cloudy

86°F

30°C

Humidity 45%
Wind Speed SW 14 G 20 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 5 Aug 3:54 pm EDT
Extended Forecast for

Cohasset MA

Heat Advisory August 6, 11:00am until August 7, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 70. Southwest wind around 7 mph.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Heat index values as high as 95. Southwest wind around 6 mph.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73. Southwest wind around 7 mph.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 89. West wind around 6 mph becoming light and variable. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Sunny then
    Showers
    Likely

  • Friday Night

    Friday 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%.

    Low: 72 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 89. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.

    High: 89 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 9pm. Partly cloudy, with a low around 71. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 90. West wind 8 to 10 mph.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. West wind around 7 mph.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 70. Southwest wind around 7 mph.
Thursday
Mostly sunny, with a high near 88. Heat index values as high as 95. Southwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 73. Southwest wind around 7 mph.
Friday
A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 89. West wind around 6 mph becoming light and variable. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday 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%.
Saturday
A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 89. Southwest wind 7 to 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 9pm. Partly cloudy, with a low around 71. Southwest wind around 7 mph. Chance of precipitation is 30%.
Sunday
Sunny and hot, with a high near 90. West wind 8 to 10 mph.
Sunday Night
Mostly clear, with a low around 69. West wind around 7 mph.
Monday
Sunny and hot, with a high near 91. Southwest wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 70. Southwest wind around 7 mph.
Tuesday
A chance of showers. Mostly sunny, with a high near 88. West wind 6 to 9 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 66. West wind around 7 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 82. West wind around 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cohasset MA
 42.24°N 70.8°W (Elev. 46 ft)
Last Update:
2:57 pm EDT Aug 5, 2026
Forecast Valid:
4pm EDT Aug 5, 2026-6pm EDT Aug 12, 2026
 
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