National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

43°F

6°C

Humidity 71%
Wind Speed S 7 mph
Barometer 30.14 in (1020.7 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 28 Feb 10:56 am EST
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: Mostly sunny, with a temperature falling to around 40 by 5pm. South wind around 7 mph.

    High: 43 °F⇓

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 8pm and 11pm. Otherwise, partly cloudy, with a low around 30. Light and variable wind becoming north 5 to 8 mph after midnight.

    Low: 30 °F

    Patchy Fog
    then Mostly
    Clear

  • Sunday

    Sunday: Snow likely, mainly between 10am and 4pm. Increasing clouds, with a high near 37. Wind chill values between 25 and 30. North wind around 8 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before 7pm. Mostly clear, with a low around 15. Wind chill values between 5 and 10. North wind 8 to 13 mph.

    Low: 15 °F

    Chance Snow
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 28. North wind 6 to 9 mph.

    High: 28 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of rain after 1pm. Increasing clouds, with a high near 41.

    High: 41 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 36. Chance of precipitation is 90%.

    Low: 36 °F

    Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 46.

    High: 46 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a temperature falling to around 40 by 5pm. South wind around 7 mph.
Tonight
Patchy fog between 8pm and 11pm. Otherwise, partly cloudy, with a low around 30. Light and variable wind becoming north 5 to 8 mph after midnight.
Sunday
Snow likely, mainly between 10am and 4pm. Increasing clouds, with a high near 37. Wind chill values between 25 and 30. North wind around 8 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
A 30 percent chance of snow before 7pm. Mostly clear, with a low around 15. Wind chill values between 5 and 10. North wind 8 to 13 mph.
Monday
Sunny, with a high near 28. North wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 19.
Tuesday
A 50 percent chance of rain after 1pm. Increasing clouds, with a high near 41.
Tuesday Night
Rain. Low around 36. Chance of precipitation is 90%.
Wednesday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 46.
Wednesday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 34.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 45.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 41.
Friday
A 30 percent chance of rain. Cloudy, with a high near 49.
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:
9:41 am EST Feb 28, 2026
Forecast Valid:
11am EST Feb 28, 2026-6pm EST Mar 6, 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