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

51°F

11°C

Humidity 38%
Wind Speed NW 15 mph
Barometer 29.93 in (1013.3 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 21 Mar 5:56 pm EDT
Extended Forecast for

2 Miles SSE South Lyme CT

  • Tonight

    Tonight: Increasing clouds, with a low around 38. North wind 5 to 10 mph becoming light and variable in the evening.

    Low: 38 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 30 percent chance of showers, mainly after 5pm. Mostly cloudy, with a high near 52. South wind 7 to 10 mph.

    High: 52 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Rain. Low around 37. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Rain

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Cloudy, with a high near 44. North wind around 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. North wind around 8 mph.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 34.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 38. North wind 5 to 10 mph becoming light and variable in the evening.
Sunday
A 30 percent chance of showers, mainly after 5pm. Mostly cloudy, with a high near 52. South wind 7 to 10 mph.
Sunday Night
Rain. Low around 37. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Cloudy, with a high near 44. North wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 30. North wind around 8 mph.
Tuesday
Sunny, with a high near 44.
Tuesday Night
Increasing clouds, with a low around 34.
Wednesday
Partly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
A 30 percent chance of rain after 8am. Partly sunny, with a high near 49.
Thursday Night
Rain likely. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Sunny, with a high near 42.
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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:
3:03 pm EDT Mar 21, 2026
Forecast Valid:
6pm EDT Mar 21, 2026-6pm EDT Mar 28, 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