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

70°F

21°C

Humidity 61%
Wind Speed SW 7 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 4 Oct 4:56 pm EDT
Extended Forecast for

Hadlyme CT

  • Tonight

    Tonight: Areas of fog after 2am. Otherwise, mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Clear then
    Areas Fog

  • Sunday

    Sunday: Areas of fog before 9am. Otherwise, sunny, with a high near 82. Calm wind becoming south around 5 mph in the afternoon.

    High: 82 °F

    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Patchy Fog

  • Monday

    Monday: Areas of fog before 9am. Otherwise, sunny, with a high near 77. Calm wind becoming south 5 to 8 mph in the morning.

    High: 77 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog. Otherwise, mostly clear, with a low around 58. Southwest wind around 6 mph.

    Low: 58 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers, mainly after 2am. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: Showers, mainly before 2pm. High near 69. Chance of precipitation is 80%.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Areas of fog after 2am. Otherwise, mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.
Sunday
Areas of fog before 9am. Otherwise, sunny, with a high near 82. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 57. Calm wind.
Monday
Areas of fog before 9am. Otherwise, sunny, with a high near 77. Calm wind becoming south 5 to 8 mph in the morning.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 58. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Showers, mainly after 2am. Low around 58. Chance of precipitation is 80%.
Wednesday
Showers, mainly before 2pm. High near 69. Chance of precipitation is 80%.
Wednesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 42.
Friday
Mostly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 69.
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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:
2:02 pm EDT Oct 4, 2025
Forecast Valid:
5pm EDT Oct 4, 2025-6pm EDT Oct 11, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation