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.

Fog/Mist

39°F

4°C

Humidity 96%
Wind Speed NE 7 mph
Barometer 30.37 in (1028.5 mb)
Dewpoint 38°F (3°C)
Visibility 4.00 mi
Wind Chill34°F (1°C)
Last update 3 Apr 4:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Overnight

    Overnight: A 20 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 39. East wind around 6 mph.

    Low: 39 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog. Otherwise, mostly cloudy, with a high near 54. East wind 5 to 9 mph becoming southwest in the afternoon.

    High: 54 °F

    Patchy Fog

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 49. Southwest wind 8 to 10 mph.

    Low: 49 °F

    Patchy Fog

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 61. Light and variable wind becoming east 5 to 10 mph in the afternoon.

    High: 61 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers, mainly after 8pm. Cloudy, with a low around 42. East wind 9 to 15 mph.

    Low: 42 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 56. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers
    Likely then
    Showers

  • Sunday Night

    Sunday Night: Showers before 8pm. Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 39. East wind around 6 mph.
Friday
Patchy fog. Otherwise, mostly cloudy, with a high near 54. East wind 5 to 9 mph becoming southwest in the afternoon.
Friday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 49. Southwest wind 8 to 10 mph.
Saturday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 61. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Saturday Night
A 50 percent chance of showers, mainly after 8pm. Cloudy, with a low around 42. East wind 9 to 15 mph.
Sunday
Showers. High near 56. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers before 8pm. Low around 40. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
A chance of rain and snow showers before 2pm, then a chance of rain showers. Partly sunny, with a high near 47. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 32.
Wednesday
Sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Mostly sunny, with a high near 52.
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:
2:20 am EDT Apr 3, 2026
Forecast Valid:
5am EDT Apr 3, 2026-6pm EDT Apr 9, 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