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

Critical Fire Weather in the Southern Plains; Severe Storms in the Ohio Valley

Strong winds and low humidity will create elevated to critical fire weather conditions across the Southern Plains on Thursday. Strong to severe thunderstorms are forecast in the Ohio Valley late Thursday into Friday morning, with the strongest storms capable of producing very large hail, damaging winds, and a few tornadoes. Read More >

Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Partly Cloudy

40°F

4°C

Humidity 89%
Wind Speed S 8 mph
Barometer 30.24 in (1024.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 25 Mar 8:56 pm EDT
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Cloudy, with a low around 38. South wind around 5 mph.

    Low: 38 °F

    Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 8 to 11 mph, with gusts as high as 23 mph.

    High: 58 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 2am. Low around 46. Southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, mainly before 8am. High near 53. North wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of rain showers before 11pm, then a slight chance of snow showers between 11pm and 2am. Mostly cloudy, with a low around 28. North wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Cloudy, with a low around 38. South wind around 5 mph.
Thursday
A 20 percent chance of showers before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 8 to 11 mph, with gusts as high as 23 mph.
Thursday Night
Showers, mainly after 2am. Low around 46. Southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers, mainly before 8am. High near 53. North wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A slight chance of rain showers before 11pm, then a slight chance of snow showers between 11pm and 2am. Mostly cloudy, with a low around 28. North wind 3 to 5 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Mostly cloudy, with a high near 52.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Mostly cloudy, with a high near 53.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 37.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
2:46 pm EDT Mar 25, 2026
Forecast Valid:
9pm EDT Mar 25, 2026-6pm EDT Apr 1, 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