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 79%
Wind Speed SW 10 mph
Barometer 30.30 in (1025.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 16 Sep 5:56 pm EDT
Extended Forecast for

4 Miles NNW Hadlyme CT

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, mostly clear, with a low around 61. Light and variable wind.

    Low: 61 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 79. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 79 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly before 5am. Mostly cloudy, with a low around 66. South wind around 6 mph.

    Low: 66 °F

    Chance
    Showers

  • Friday

    Friday: Mostly cloudy through mid morning, then becoming sunny, with a high near 78. North wind 7 to 9 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. North wind 5 to 7 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely after 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.

    High: 67 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 8pm. Otherwise, mostly clear, with a low around 61. Light and variable wind.
Thursday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 79. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
A 40 percent chance of showers, mainly before 5am. Mostly cloudy, with a low around 66. South wind around 6 mph.
Friday
Mostly cloudy through mid morning, then becoming sunny, with a high near 78. North wind 7 to 9 mph.
Friday Night
Partly cloudy, with a low around 52. North wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Showers likely after 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 67.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 66.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Hadlyme CT
 41.44°N 72.35°W (Elev. 433 ft)
Last Update:
3:19 pm EDT Sep 16, 2026
Forecast Valid:
6pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026
 
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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