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

57°F

14°C

Humidity 55%
Wind Speed SW 14 mph
Barometer 29.87 in (1011.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 11 Nov 2:56 pm EST
Extended Forecast for

Groton CT

  • Tonight

    Tonight: Increasing clouds, with a low around 42. Calm wind becoming east 5 to 9 mph after midnight.

    Low: 42 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Showers, mainly after noon. High near 58. East wind 9 to 16 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Mostly Cloudy
    then Showers

  • Thursday Night

    Thursday Night: Rain, mainly before midnight. Low around 37. Breezy, with a northeast wind 17 to 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Rain and
    Breezy

  • Friday

    Friday: Rain, mainly before 4pm. High near 48. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 31. North wind 10 to 13 mph.

    Low: 31 °F

    Chance Rain

  • Saturday

    Saturday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 42. Calm wind becoming east 5 to 9 mph after midnight.
Thursday
Showers, mainly after noon. High near 58. East wind 9 to 16 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain, mainly before midnight. Low around 37. Breezy, with a northeast wind 17 to 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 48. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 31. North wind 10 to 13 mph.
Saturday
Mostly cloudy, with a high near 49.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Sunny, with a high near 52.
Tuesday Night
Mostly clear, with a low around 35.
Wednesday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.34°N 72.08°W (Elev. 36 ft)
Last Update:
2:56 pm EST Nov 11, 2026
Forecast Valid:
3pm EST Nov 11, 2026-6pm EST Nov 18, 2026
 
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