National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Storm Moving from Western into Central U.S. through Wednesday

A storm system moving over the Rockies Wednesday will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Moderate snow is expected from northwestern Wyoming into southern Montana. Read More >

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Overcast

53°F

12°C

Humidity 100%
Wind Speed N 8 mph
Barometer 29.99 in (1015.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 15 Oct 12:56 am EDT
Extended Forecast for

South Lyme CT

  • Overnight

    Overnight: Mostly cloudy, with a low around 50. North wind 3 to 5 mph.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. North wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39. North wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58. North wind 10 to 15 mph.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 38. North wind 7 to 10 mph.

    Low: 38 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 50. North wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 66. North wind 6 to 11 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 39. North wind 7 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 58. North wind 10 to 15 mph.
Thursday Night
Mostly clear, with a low around 38. North wind 7 to 10 mph.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 66.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 66.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.35°N 72.29°W (Elev. 98 ft)
Last Update:
6:57 pm EDT Oct 14, 2025
Forecast Valid:
1am EDT Oct 15, 2025-6pm EDT Oct 21, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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