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

59°F

15°C

Humidity 96%
Wind Speed N 6 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 18 May 3:56 am EDT
Extended Forecast for

3 Miles ESE South Lyme CT

  • Today

    Today: Sunny, with a high near 76. Calm wind becoming east 5 to 8 mph in the morning.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Light southwest wind.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Southwest wind 5 to 11 mph.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind around 8 mph.

    Low: 65 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 84. Southwest wind 7 to 13 mph. Chance of precipitation is 70%.

    High: 84 °F

    Sunny then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 76. Calm wind becoming east 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 61. Light southwest wind.
Tuesday
Mostly sunny, with a high near 82. Southwest wind 5 to 11 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind around 8 mph.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 84. Southwest wind 7 to 13 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Partly sunny, with a high near 65.
Friday Night
A 50 percent chance of showers after 8pm. Mostly cloudy, with a low around 50.
Saturday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Sunday
Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE South Lyme CT
 41.3°N 72.27°W (Elev. 75 ft)
Last Update:
2:32 am EDT May 18, 2026
Forecast Valid:
4am EDT May 18, 2026-6pm EDT May 24, 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