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

52°F

11°C

Humidity 72%
Wind Speed S 8 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 10 Mar 3:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 39. South wind 5 to 7 mph becoming calm in the evening.

    Low: 39 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 52. Southeast wind 5 to 10 mph.

    High: 52 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 47. Southwest wind 11 to 15 mph.

    Low: 47 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely before 5pm, then rain and snow likely. Mostly cloudy, with a temperature falling to around 42 by 5pm. Northwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 54 °F⇓

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Snow likely before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 31. Northwest wind 9 to 13 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 31 °F

    Snow Likely
    then Mostly
    Clear

  • Friday

    Friday: Increasing clouds, with a high near 44.

    High: 44 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 37. Breezy.

    Low: 37 °F

    Chance Rain
    and Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 39. South wind 5 to 7 mph becoming calm in the evening.
Wednesday
A 30 percent chance of showers, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 52. Southeast wind 5 to 10 mph.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 47. Southwest wind 11 to 15 mph.
Thursday
Rain likely before 5pm, then rain and snow likely. Mostly cloudy, with a temperature falling to around 42 by 5pm. Northwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
Snow likely before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 31. Northwest wind 9 to 13 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Friday
Increasing clouds, with a high near 44.
Friday Night
A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 37. Breezy.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Cloudy, with a high near 49.
Sunday Night
Rain. Low around 43. Breezy. Chance of precipitation is 80%.
Monday
Rain. High near 52. Breezy. Chance of precipitation is 90%.
Monday Night
Rain and snow likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of snow. Mostly sunny, with a high near 37.
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:
1:57 pm EDT Mar 10, 2026
Forecast Valid:
4pm EDT Mar 10, 2026-6pm EDT Mar 17, 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