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

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

69°F

21°C

Humidity 55%
Wind Speed N 10 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 26 Aug 9:56 am EDT
Extended Forecast for

Hadlyme CT

  • Today

    Today: Sunny, with a high near 79. West wind 5 to 8 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Isolated showers before 11pm. Partly cloudy, with a low around 57. Calm wind. Chance of precipitation is 20%.

    Low: 57 °F

    Isolated
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of sprinkles before 2pm, then a slight chance of showers after 2pm. Mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 79. West wind 5 to 8 mph.
Tonight
Isolated showers before 11pm. Partly cloudy, with a low around 57. Calm wind. Chance of precipitation is 20%.
Wednesday
A slight chance of sprinkles before 2pm, then a slight chance of showers after 2pm. Mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 54. Calm wind.
Thursday
Mostly sunny, with a high near 78. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 61.
Friday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 55.
Labor Day
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.38°N 72.34°W (Elev. 69 ft)
Last Update:
9:07 am EDT Aug 26, 2025
Forecast Valid:
10am EDT Aug 26, 2025-6pm EDT Sep 1, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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