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.

Fair

15°F

-9°C

Humidity 91%
Wind Speed Calm
Barometer 30.20 in (1022.6 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 27 Dec 9:56 pm EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 18. Light northwest wind.

    Low: 18 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 41. Wind chill values between 20 and 30. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 41 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain. Temperature rising to around 43 by 5am. South wind 6 to 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F⇑

    Rain Likely
    then Rain

  • Monday

    Monday: Rain. High near 50. Southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Rain

  • Monday Night

    Monday Night: A slight chance of rain showers before 10pm, then a slight chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 26. Breezy, with a west wind around 21 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 32. Breezy.

    High: 32 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. Breezy.

    Low: 25 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 18. Light northwest wind.
Sunday
Increasing clouds, with a high near 41. Wind chill values between 20 and 30. Light and variable wind becoming west 5 to 7 mph in the morning.
Sunday Night
Rain. Temperature rising to around 43 by 5am. South wind 6 to 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain. High near 50. Southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A slight chance of rain showers before 10pm, then a slight chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 26. Breezy, with a west wind around 21 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 32. Breezy.
Tuesday Night
Partly cloudy, with a low around 25. Breezy.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 26.
New Year's Day
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 19.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
12:59 pm EST Dec 27, 2025
Forecast Valid:
10pm EST Dec 27, 2025-6pm EST Jan 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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