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.

A Few Clouds

52°F

11°C

Humidity 77%
Wind Speed SW 10 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 26 Mar 11:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • This Afternoon

    This Afternoon: A 30 percent chance of showers after 5pm. Partly sunny, with a high near 54. Southwest wind 13 to 15 mph.

    High: 54 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 45. Southwest wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers before 2pm. Cloudy, with a steady temperature around 47. North wind 9 to 11 mph.

    High: 47 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of rain, mixing with snow after 11pm, then gradually ending. Mostly cloudy, with a low around 31. Wind chill values between 25 and 30. Light and variable wind becoming northeast 5 to 7 mph after midnight. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 40. Northwest wind 11 to 13 mph.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 30 percent chance of showers after 5pm. Partly sunny, with a high near 54. Southwest wind 13 to 15 mph.
Tonight
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 45. Southwest wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 50 percent chance of showers before 2pm. Cloudy, with a steady temperature around 47. North wind 9 to 11 mph.
Friday Night
A slight chance of rain, mixing with snow after 11pm, then gradually ending. Mostly cloudy, with a low around 31. Wind chill values between 25 and 30. Light and variable wind becoming northeast 5 to 7 mph after midnight. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 40. Northwest wind 11 to 13 mph.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Mostly cloudy, with a high near 51.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 51.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
5:42 am EDT Mar 26, 2026
Forecast Valid:
12pm EDT Mar 26, 2026-6pm EDT Apr 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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