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.

Overcast

38°F

3°C

Humidity 79%
Wind Speed Calm
Barometer 29.91 in (1012.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 6 Dec 8:56 am EST
Extended Forecast for

Groton CT

  • Today

    Today: A chance of drizzle before 1pm. Mostly cloudy, with a high near 42. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 42 °F

    Chance
    Drizzle

  • Tonight

    Tonight: Partly cloudy, with a low around 30. West wind around 8 mph.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Wind chill values between 25 and 35. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. Wind chill values between 15 and 20. Northwest wind 6 to 11 mph increasing to 13 to 18 mph after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Blustery, with a northwest wind 14 to 21 mph.

    High: 31 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 40.

    High: 40 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
A chance of drizzle before 1pm. Mostly cloudy, with a high near 42. Light and variable wind becoming west 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 30. West wind around 8 mph.
Sunday
Partly sunny, with a high near 41. Wind chill values between 25 and 35. Northwest wind around 7 mph becoming southwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 26. Wind chill values between 15 and 20. Northwest wind 6 to 11 mph increasing to 13 to 18 mph after midnight.
Monday
Mostly sunny, with a high near 31. Blustery, with a northwest wind 14 to 21 mph.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Increasing clouds, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 47.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 38.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
7:42 am EST Dec 6, 2025
Forecast Valid:
9am EST Dec 6, 2025-6pm EST Dec 12, 2025
 
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