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

40°F

4°C

Humidity 86%
Wind Speed Calm
Barometer 30.05 in (1017.6 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 28 Feb 5:56 pm EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. Calm wind becoming north around 5 mph after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Snow likely, mainly before 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. North wind 6 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 13. Wind chill values between 5 and 10. North wind around 9 mph.

    Low: 13 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values between 5 and 15. North wind 3 to 7 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. Light and variable wind.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Rain likely after 1pm. Increasing clouds, with a high near 42. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 42 °F

    Partly Sunny
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 36. Chance of precipitation is 100%.

    Low: 36 °F

    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after 1am. Cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 27. Calm wind becoming north around 5 mph after midnight.
Sunday
Snow likely, mainly before 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. North wind 6 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
Mostly clear, with a low around 13. Wind chill values between 5 and 10. North wind around 9 mph.
Monday
Sunny, with a high near 29. Wind chill values between 5 and 15. North wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 19. Light and variable wind.
Tuesday
Rain likely after 1pm. Increasing clouds, with a high near 42. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Low around 36. Chance of precipitation is 100%.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
A 40 percent chance of rain after 1am. Cloudy, with a low around 34.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 48.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 39.
Friday
A 50 percent chance of rain. Cloudy, with a high near 48.
Friday Night
A 30 percent chance of rain. Cloudy, with a low around 38.
Saturday
Mostly cloudy, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
6:27 pm EST Feb 28, 2026
Forecast Valid:
6pm EST Feb 28, 2026-6pm EST Mar 7, 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