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

52°F

11°C

Humidity 89%
Wind Speed E 3 mph
Barometer 30.15 in (1021.0 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 15 Oct 7:56 am EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: Sunny, with a high near 62. North wind 5 to 10 mph becoming light northeast in the afternoon.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers after 5am. Increasing clouds, with a low around 51. Light southeast wind increasing to 5 to 10 mph in the evening.

    Low: 51 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 68. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers after 8pm. Low around 46. Southwest wind 10 to 14 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a steady temperature around 50. North wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 50 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 62. North wind 5 to 10 mph becoming light northeast in the afternoon.
Tonight
A 30 percent chance of showers after 5am. Increasing clouds, with a low around 51. Light southeast wind increasing to 5 to 10 mph in the evening.
Friday
Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 68. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers after 8pm. Low around 46. Southwest wind 10 to 14 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a steady temperature around 50. North wind 16 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
7:44 am EDT Oct 15, 2026
Forecast Valid:
8am EDT Oct 15, 2026-6pm EDT Oct 21, 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