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.

Overcast

38°F

3°C

Humidity 60%
Wind Speed E 10 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 19 Feb 11:56 am EST
Extended Forecast for

3 Miles SSE South Lyme CT

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 37. Southeast wind around 10 mph.

    High: 37 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of rain after 4am. Mostly cloudy, with a steady temperature around 34. East wind around 8 mph.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain, possibly mixed with snow, becoming all rain after 10am. High near 38. East wind 10 to 15 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow
    then Rain

  • Friday Night

    Friday Night: Rain likely before 4am, then a chance of snow. Cloudy, with a low around 32. Northeast wind 6 to 11 mph becoming north after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after 1pm. Mostly cloudy, with a high near 38. North wind 5 to 7 mph becoming east in the afternoon.

    High: 38 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Snow

  • Monday

    Monday: A 40 percent chance of snow. Mostly cloudy, with a high near 35.

    High: 35 °F

    Chance Snow

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 37. Southeast wind around 10 mph.
Tonight
A 30 percent chance of rain after 4am. Mostly cloudy, with a steady temperature around 34. East wind around 8 mph.
Friday
Rain, possibly mixed with snow, becoming all rain after 10am. High near 38. East wind 10 to 15 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Friday Night
Rain likely before 4am, then a chance of snow. Cloudy, with a low around 32. Northeast wind 6 to 11 mph becoming north after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
A 30 percent chance of snow, mainly after 1pm. Mostly cloudy, with a high near 38. North wind 5 to 7 mph becoming east in the afternoon.
Saturday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 28.
Sunday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 29.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 35.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Partly sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
10:22 am EST Feb 19, 2026
Forecast Valid:
12pm EST Feb 19, 2026-6pm EST Feb 25, 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