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.

Light Rain Fog/Mist

45°F

7°C

Humidity 100%
Wind Speed N 3 mph
Barometer 29.72 in (1006.4 mb)
Dewpoint 45°F (7°C)
Visibility 6.00 mi
Last update 22 Mar 8:56 pm EDT
Extended Forecast for

2 Miles SSE South Lyme CT

  • Tonight

    Tonight: Rain. Low around 37. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Rain

  • Monday

    Monday: Rain, mainly before 11am. High near 44. North wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind 7 to 9 mph.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 45. Wind chill values between 20 and 30 early. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind around 7 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Rain. Low around 37. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Rain, mainly before 11am. High near 44. North wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 45. Wind chill values between 20 and 30 early. Northwest wind around 7 mph becoming southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind around 7 mph.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
Partly sunny, with a high near 51.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
Rain likely, mainly before 8am. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Sunny, with a high near 40.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Mostly sunny, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
3:49 pm EDT Mar 22, 2026
Forecast Valid:
9pm EDT Mar 22, 2026-6pm EDT Mar 29, 2026
 
Forecast Discussion
 
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Additional Resources

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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