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

44°F

7°C

Humidity 93%
Wind Speed Calm
Barometer 29.73 in (1006.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 21 Mar 3:56 am EDT
Extended Forecast for

New London CT

  • Overnight

    Overnight: A 20 percent chance of rain before 5am. Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 40. West wind around 5 mph.

    Low: 40 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 54. North wind 6 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 53. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 53 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly after 8pm. Low around 35. Light and variable wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Rain

  • Monday

    Monday: A chance of rain and snow before 11am, then a chance of rain between 11am and 2pm. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain before 5am. Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 40. West wind around 5 mph.
Saturday
Mostly sunny, with a high near 54. North wind 6 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 37. Calm wind.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 53. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Rain, mainly after 8pm. Low around 35. Light and variable wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A chance of rain and snow before 11am, then a chance of rain between 11am and 2pm. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Partly sunny, with a high near 47.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
New London CT
 41.35°N 72.11°W (Elev. 98 ft)
Last Update:
2:34 am EDT Mar 21, 2026
Forecast Valid:
4am EDT Mar 21, 2026-6pm EDT Mar 27, 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