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

42°F

6°C

Humidity 49%
Wind Speed W 13 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 18 Nov 8:56 am EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Today

    Today: Sunny, with a high near 47. West wind 9 to 11 mph.

    High: 47 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. West wind around 6 mph becoming calm in the evening.

    Low: 34 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 48. Calm wind becoming northwest around 6 mph.

    High: 48 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Areas of frost. Otherwise, increasing clouds, with a low around 33. Light north wind.

    Low: 33 °F

    Areas Frost

  • Thursday

    Thursday: Partly sunny, with a high near 50. Northeast wind around 6 mph becoming light and variable in the afternoon.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of rain. Mostly cloudy, with a high near 55.

    High: 55 °F

    Chance Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 47. West wind 9 to 11 mph.
Tonight
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. West wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 48. Calm wind becoming northwest around 6 mph.
Wednesday Night
Areas of frost. Otherwise, increasing clouds, with a low around 33. Light north wind.
Thursday
Partly sunny, with a high near 50. Northeast wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
Mostly cloudy, with a low around 41.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 55.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
5:29 am EST Nov 18, 2025
Forecast Valid:
9am EST Nov 18, 2025-6pm EST Nov 24, 2025
 
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