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.

Mostly Cloudy

41°F

5°C

Humidity 53%
Wind Speed S 9 mph
Barometer 30.04 in (1017.0 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 7 Dec 1:56 pm EST
Extended Forecast for

Hadlyme CT

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 40. Light southwest wind.

    High: 40 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 20. Calm wind becoming northwest 5 to 9 mph in the evening. Winds could gust as high as 26 mph.

    Low: 20 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 28. Wind chill values between 10 and 20. North wind 8 to 13 mph, with gusts as high as 31 mph.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. Light north wind.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 39. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 39 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of rain. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 40. Light southwest wind.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 20. Calm wind becoming northwest 5 to 9 mph in the evening. Winds could gust as high as 26 mph.
Monday
Mostly sunny, with a high near 28. Wind chill values between 10 and 20. North wind 8 to 13 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 13. Light north wind.
Tuesday
Increasing clouds, with a high near 39. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 47.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A 30 percent chance of snow. Partly sunny, with a high near 37.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.42°N 72.33°W (Elev. 207 ft)
Last Update:
12:47 pm EST Dec 7, 2025
Forecast Valid:
2pm EST Dec 7, 2025-6pm EST Dec 13, 2025
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation