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.

A Few Clouds

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 29.80 in (1009.1 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Jun 2:56 am EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Overnight

    Overnight: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. Light and variable wind.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Calm wind becoming southeast 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 73 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 63. Southeast wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 63 °F

    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 75 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 61. Calm wind.
Sunday
Sunny, with a high near 76. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 61. Light and variable wind.
Monday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Calm wind becoming southeast 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 63. Southeast wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tuesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 64.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
2:19 am EDT Jun 21, 2026
Forecast Valid:
3am EDT Jun 21, 2026-6pm EDT Jun 27, 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