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.

Partly Cloudy

46°F

8°C

Humidity 56%
Wind Speed NW 12 mph
Barometer 29.85 in (1010.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 13 Nov 4:56 pm EST
Extended Forecast for

Deep River CT

  • Tonight

    Tonight: Mostly clear, with a low around 32. Northwest wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. Northwest wind around 6 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 52. Wind chill values between 20 and 30 early. Northwest wind 5 to 8 mph becoming west in the afternoon.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Rain. Temperature rising to around 45 by 3am. Southwest wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F⇑

    Rain

  • Sunday

    Sunday: A 40 percent chance of rain before 1pm. Partly sunny, with a high near 58.

    High: 58 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Northwest wind 6 to 9 mph, with gusts as high as 22 mph.
Friday
Sunny, with a high near 48. Northwest wind 7 to 11 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 27. Northwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 52. Wind chill values between 20 and 30 early. Northwest wind 5 to 8 mph becoming west in the afternoon.
Saturday Night
Rain. Temperature rising to around 45 by 3am. Southwest wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of rain before 1pm. Partly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Mostly sunny, with a high near 47.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Deep River CT
 41.39°N 72.43°W (Elev. 49 ft)
Last Update:
1:01 pm EST Nov 13, 2025
Forecast Valid:
5pm EST Nov 13, 2025-6pm EST Nov 20, 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