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

31°F

-1°C

Humidity 59%
Wind Speed W 3 mph
Barometer 30.41 in (1029.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 15 Mar 3:56 am EDT
Extended Forecast for

2 Miles N South Lyme CT

  • Today

    Today: Partly sunny, with a high near 44. Calm wind becoming southeast 5 to 9 mph in the afternoon.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly after 5am. Patchy fog after 2am. Low around 36. East wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Partly Cloudy
    then Showers
    and Patchy
    Fog

  • Monday

    Monday: Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 58. South wind around 17 mph, with gusts as high as 37 mph. Chance of precipitation is 50%.

    High: 58 °F

    Intermittent
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Periods of showers and possibly a thunderstorm before 2am, then showers likely. Some of the storms could produce heavy rainfall. Low around 38. Breezy, with a south wind 16 to 21 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Heavy Rain
    and Breezy

  • Tuesday

    Tuesday: Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a steady temperature around 41. West wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 41 °F

    Showers
    Likely then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 38.

    High: 38 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 44. Calm wind becoming southeast 5 to 9 mph in the afternoon.
Tonight
Showers and possibly a thunderstorm, mainly after 5am. Patchy fog after 2am. Low around 36. East wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 58. South wind around 17 mph, with gusts as high as 37 mph. Chance of precipitation is 50%.
Monday Night
Periods of showers and possibly a thunderstorm before 2am, then showers likely. Some of the storms could produce heavy rainfall. Low around 38. Breezy, with a south wind 16 to 21 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a steady temperature around 41. West wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Increasing clouds, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 49.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 48.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N South Lyme CT
 41.35°N 72.29°W (Elev. 98 ft)
Last Update:
4:56 am EDT Mar 15, 2026
Forecast Valid:
5am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation