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

65°F

18°C

Humidity 76%
Wind Speed SW 8 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 15 Apr 10:56 am EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Today

    Today: A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 69. South wind 3 to 8 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, with a high near 70. South wind 3 to 8 mph.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 52. Southwest wind 3 to 6 mph.

    Low: 52 °F

    Slight Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 69. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers after 8am. Mostly cloudy, with a high near 58.

    High: 58 °F

    Chance
    Showers

Detailed Forecast

Today
A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 69. South wind 3 to 8 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.
Thursday
Partly sunny, with a high near 70. South wind 3 to 8 mph.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52. Southwest wind 3 to 6 mph.
Friday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 69. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 50%.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Partly sunny, with a high near 59.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
A 50 percent chance of showers after 8am. Mostly cloudy, with a high near 58.
Sunday Night
A chance of rain showers before 5am, then a chance of rain and snow showers. Mostly cloudy, with a low around 39. Chance of precipitation is 50%.
Monday
A 30 percent chance of snow showers. Mostly sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
5:23 am EDT Apr 15, 2026
Forecast Valid:
11am EDT Apr 15, 2026-6pm EDT Apr 21, 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