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.

Partly Cloudy

59°F

15°C

Humidity 93%
Wind Speed W 3 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 17 Apr 8:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 68. North wind 3 to 6 mph. Chance of precipitation is 50%.

    High: 68 °F

    Chance
    Showers

  • Tonight

    Tonight: Scattered showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 51. Northeast wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 51 °F

    Scattered
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 57. Northeast wind 5 to 8 mph becoming east in the afternoon.

    High: 57 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southeast wind 3 to 6 mph.

    Low: 46 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 55. Southeast wind 6 to 13 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 38. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 68. North wind 3 to 6 mph. Chance of precipitation is 50%.
Tonight
Scattered showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 51. Northeast wind 3 to 6 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 57. Northeast wind 5 to 8 mph becoming east in the afternoon.
Saturday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southeast wind 3 to 6 mph.
Sunday
Showers, mainly after 8am. High near 55. Southeast wind 6 to 13 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers, mainly before 8pm. Low around 38. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Sunny, with a high near 48.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 58.
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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:
2:22 am EDT Apr 17, 2026
Forecast Valid:
9am EDT Apr 17, 2026-6pm EDT Apr 23, 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