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.

Fair

60°F

16°C

Humidity 96%
Wind Speed NE 3 mph
Barometer 29.79 in (1008.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 20 Jun 10:56 pm EDT
Extended Forecast for

Hadlyme CT

  • Tonight

    Tonight: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 78 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 72 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 62. Southeast wind around 7 mph becoming south after midnight. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 62 °F

    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 58. Calm wind.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 59. Calm wind.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 62. Southeast wind around 7 mph becoming south after midnight. 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 76. 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 61.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 62.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 63.
Saturday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.42°N 72.33°W (Elev. 207 ft)
Last Update:
9:59 pm EDT Jun 20, 2026
Forecast Valid:
11pm EDT Jun 20, 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