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.

Overcast

32°F

0°C

Humidity 79%
Wind Speed N 5 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Dec 7:56 am EST
Extended Forecast for

Deep River CT

  • Today

    Today: A chance of snow and freezing rain before 10am, then a slight chance of drizzle between 10am and 1pm. Mostly cloudy, with a high near 41. Calm wind becoming west around 5 mph. Chance of precipitation is 30%.

    High: 41 °F

    Chance Wintry
    Mix then
    Slight Chance
    Drizzle

  • Tonight

    Tonight: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40. Light and variable wind.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 22. Wind chill values between 15 and 20. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 22 mph.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 31. North wind 9 to 15 mph, with gusts as high as 29 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 38.

    High: 38 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
A chance of snow and freezing rain before 10am, then a slight chance of drizzle between 10am and 1pm. Mostly cloudy, with a high near 41. Calm wind becoming west around 5 mph. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 25. Calm wind.
Sunday
Partly sunny, with a high near 40. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 22. Wind chill values between 15 and 20. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 22 mph.
Monday
Sunny, with a high near 31. North wind 9 to 15 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Increasing clouds, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 47.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Friday
A 30 percent chance of snow. Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Deep River CT
 41.39°N 72.43°W (Elev. 49 ft)
Last Update:
7:42 am EST Dec 6, 2025
Forecast Valid:
8am EST Dec 6, 2025-6pm EST Dec 12, 2025
 
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