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

34°F

1°C

Humidity 59%
Wind Speed W 8 mph
Barometer 30.29 in (1025.8 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 29 Nov 6:56 am EST
Extended Forecast for

Groton CT

  • Today

    Today: Sunny, with a high near 43. Northwest wind 11 to 15 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Northwest wind around 5 mph becoming calm.

    Low: 33 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 52. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Chance Rain
    then Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain likely before 1am. Cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a southwest wind 17 to 23 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Rain Likely
    and Breezy

  • Monday

    Monday: Sunny, with a high near 41. Northwest wind 14 to 17 mph.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 30.

    Low: 30 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain, mainly after 1pm. High near 46. Chance of precipitation is 80%.

    High: 46 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.

    Low: 34 °F

    Rain Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 43. Northwest wind 11 to 15 mph.
Tonight
Increasing clouds, with a low around 33. Northwest wind around 5 mph becoming calm.
Sunday
Rain, mainly after 1pm. High near 52. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain likely before 1am. Cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a southwest wind 17 to 23 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Sunny, with a high near 41. Northwest wind 14 to 17 mph.
Monday Night
Increasing clouds, with a low around 30.
Tuesday
Rain, mainly after 1pm. High near 46. Chance of precipitation is 80%.
Tuesday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Partly sunny, with a high near 41. Breezy.
Thursday Night
Partly cloudy, with a low around 23. Blustery.
Friday
Mostly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
5:02 am EST Nov 29, 2025
Forecast Valid:
7am EST Nov 29, 2025-6pm EST Dec 5, 2025
 
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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