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

39°F

4°C

Humidity 93%
Wind Speed Calm
Barometer 30.00 in (1015.8 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 11 Mar 3:56 am EDT
Extended Forecast for

3 Miles ENE East Haddam CT

  • Today

    Today: A 20 percent chance of showers after noon. Mostly sunny, with a high near 67. Light east wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 67 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms. Areas of fog between 11pm and 2am. Otherwise, mostly cloudy, with a low around 42. South wind around 11 mph, with gusts as high as 23 mph.

    Low: 42 °F

    Chance
    Showers and
    Areas Fog

  • Thursday

    Thursday: A chance of rain showers before 2pm, then a slight chance of rain and snow showers. Mostly cloudy, with a temperature rising to near 53 by 8am, then falling to around 39 during the remainder of the day. Northwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 53 °F⇓

    Chance
    Showers then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 29 °F

    Gradual
    Clearing

  • Friday

    Friday: Increasing clouds, with a high near 43. West wind 5 to 14 mph becoming south in the afternoon. Winds could gust as high as 26 mph.

    High: 43 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 30 percent chance of showers before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35.

    Low: 35 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 46.

    High: 46 °F

    Cloudy

Detailed Forecast

Today
A 20 percent chance of showers after noon. Mostly sunny, with a high near 67. Light east wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tonight
A 40 percent chance of showers and thunderstorms. Areas of fog between 11pm and 2am. Otherwise, mostly cloudy, with a low around 42. South wind around 11 mph, with gusts as high as 23 mph.
Thursday
A chance of rain showers before 2pm, then a slight chance of rain and snow showers. Mostly cloudy, with a temperature rising to near 53 by 8am, then falling to around 39 during the remainder of the day. Northwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Thursday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 29. West wind 7 to 10 mph, with gusts as high as 21 mph.
Friday
Increasing clouds, with a high near 43. West wind 5 to 14 mph becoming south in the afternoon. Winds could gust as high as 26 mph.
Friday Night
A 30 percent chance of showers before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Cloudy, with a high near 46.
Sunday Night
Rain, mainly after 2am. Low around 39. Chance of precipitation is 80%.
Monday
Rain. High near 55. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE East Haddam CT
 41.47°N 72.41°W (Elev. 554 ft)
Last Update:
3:05 am EDT Mar 11, 2026
Forecast Valid:
4am EDT Mar 11, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation