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

35°F

2°C

Humidity 93%
Wind Speed Calm
Barometer 30.20 in (1022.7 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 19 Mar 10:56 pm EDT
Extended Forecast for

Groton CT

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 36. Southwest wind around 6 mph.

    Low: 36 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of rain after 5pm. Increasing clouds, with a high near 46. Light and variable wind becoming south 8 to 13 mph in the afternoon.

    High: 46 °F

    Mostly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 42. Southwest wind 13 to 18 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain Likely

  • Saturday

    Saturday: A 30 percent chance of rain before 8am. Mostly sunny, with a high near 51. Northwest wind around 9 mph.

    High: 51 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. Northwest wind around 7 mph becoming southeast after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 8am. Mostly cloudy, with a high near 47. Chance of precipitation is 60%.

    High: 47 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a steady temperature around 36. Southwest wind around 6 mph.
Friday
A 30 percent chance of rain after 5pm. Increasing clouds, with a high near 46. Light and variable wind becoming south 8 to 13 mph in the afternoon.
Friday Night
Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 42. Southwest wind 13 to 18 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
A 30 percent chance of rain before 8am. Mostly sunny, with a high near 51. Northwest wind around 9 mph.
Saturday Night
Mostly cloudy, with a low around 38. Northwest wind around 7 mph becoming southeast after midnight.
Sunday
Mostly cloudy, with a high near 49.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 47. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Partly sunny, with a high near 44.
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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:
6:12 pm EDT Mar 19, 2026
Forecast Valid:
11pm EDT Mar 19, 2026-6pm EDT Mar 26, 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