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

Hazardous Weather Conditions

Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fog/Mist

45°F

7°C

Humidity 100%
Wind Speed SE 6 mph
Barometer 29.82 in (1009.9 mb)
Dewpoint 45°F (7°C)
Visibility 1.75 mi
Wind Chill42°F (6°C)
Last update 19 Apr 5:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

Freeze Watch April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Freeze Watch

  • Today

    Today: Showers. Areas of fog before 8am. High near 52. Southeast wind 6 to 11 mph becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Showers and
    Areas Fog

  • Tonight

    Tonight: Showers likely before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely then
    Clear

  • Monday

    Monday: A 30 percent chance of showers. Increasing clouds, with a high near 48. West wind 5 to 8 mph.

    High: 48 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. North wind 7 to 9 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 48. North wind 5 to 7 mph becoming light and variable.

    High: 48 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 40.

    Low: 40 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
Showers. Areas of fog before 8am. High near 52. Southeast wind 6 to 11 mph becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Showers likely before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind 5 to 10 mph. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers. Increasing clouds, with a high near 48. West wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 34. North wind 7 to 9 mph.
Tuesday
Sunny, with a high near 48. North wind 5 to 7 mph becoming light and variable.
Tuesday Night
Increasing clouds, with a low around 40.
Wednesday
Mostly cloudy, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 56.
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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:
4:26 am EDT Apr 19, 2026
Forecast Valid:
6am EDT Apr 19, 2026-6pm EDT Apr 25, 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