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

58°F

14°C

Humidity 84%
Wind Speed W 6 mph
Barometer 30.24 in (1024.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 9 Jun 2:56 am EDT
Extended Forecast for

Hadlyme CT

  • Overnight

    Overnight: Clear, with a low around 54. Light west wind.

    Low: 54 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Southwest wind 6 to 11 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. Southwest wind 3 to 8 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Southwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 76 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 63. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 54. Light west wind.
Tuesday
Sunny, with a high near 78. Southwest wind 6 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 60. Southwest wind 3 to 8 mph.
Wednesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Southwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 63. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 50 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 86.
Friday Night
A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 61.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hadlyme CT
 41.4°N 72.34°W (Elev. 299 ft)
Last Update:
2:07 pm EDT Jun 8, 2026
Forecast Valid:
3am EDT Jun 9, 2026-6pm EDT Jun 15, 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