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

49°F

9°C

Humidity 90%
Wind Speed SW 3 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 31 Mar 8:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 49. Southwest wind 13 to 16 mph.

    Low: 49 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Partly sunny, with a high near 63. Southwest wind 9 to 11 mph.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers, mainly before 2am. Patchy fog after 2am. Low around 40. Northeast wind 5 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 30 percent chance of light rain, mainly before noon. Patchy fog. Otherwise, cloudy, with a high near 44. Northeast wind around 14 mph.

    High: 44 °F

    Chance Light
    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: A 30 percent chance of light rain, mainly before midnight. Patchy fog. Otherwise, cloudy, with a steady temperature around 42. East wind 6 to 11 mph.

    Low: 42 °F

    Chance Light
    Rain and
    Patchy Fog

  • Friday

    Friday: Areas of fog before noon. Otherwise, mostly cloudy, with a high near 56.

    High: 56 °F

    Areas Fog
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 49. Southwest wind 13 to 16 mph.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 63. Southwest wind 9 to 11 mph.
Wednesday Night
Showers, mainly before 2am. Patchy fog after 2am. Low around 40. Northeast wind 5 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 30 percent chance of light rain, mainly before noon. Patchy fog. Otherwise, cloudy, with a high near 44. Northeast wind around 14 mph.
Thursday Night
A 30 percent chance of light rain, mainly before midnight. Patchy fog. Otherwise, cloudy, with a steady temperature around 42. East wind 6 to 11 mph.
Friday
Areas of fog before noon. Otherwise, mostly cloudy, with a high near 56.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47.
Sunday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 49.
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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:
9:03 pm EDT Mar 31, 2026
Forecast Valid:
9pm EDT Mar 31, 2026-6pm EDT Apr 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