National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

35°F

2°C

Humidity 93%
Wind Speed N 5 mph
Barometer 30.50 in (1032.9 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 9 Oct 11:56 pm EDT
Extended Forecast for

Deep River CT

Coastal Flood Watch October 12, 08:00am until October 13, 06:00pm
Frost Advisory until October 10, 09:00am
Click here for hazard details and duration
Coastal Flood Watch
Frost Advisory
  •  
    Frost Advisory until October 10, 09:00am

    NOW until 9:00am Fri

    Frost Advisory

  • Overnight

    Low: 40 °F

    Patchy Frost

  • Friday

    Friday: Areas of frost before 10am. Otherwise, sunny, with a high near 62. Calm wind becoming south around 6 mph in the afternoon.

    High: 62 °F

    Areas Frost
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 69. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 69 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 50. Northeast wind 5 to 8 mph.

    Low: 50 °F

    Chance Rain

  • Sunday

    Sunday: Rain likely, mainly after 2pm. Cloudy, with a high near 63. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 63 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain. Low around 51. Breezy. Chance of precipitation is 80%.

    Low: 51 °F

    Rain and
    Breezy

  • Columbus Day

    Columbus Day: Rain. High near 64. Breezy. Chance of precipitation is 80%.

    High: 64 °F

    Rain and
    Breezy

Detailed Forecast

Overnight
Patchy frost after 1am. Otherwise, clear, with a steady temperature around 40. North wind 3 to 5 mph.
Friday
Areas of frost before 10am. Otherwise, sunny, with a high near 62. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 45. Calm wind.
Saturday
Partly sunny, with a high near 69. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 50. Northeast wind 5 to 8 mph.
Sunday
Rain likely, mainly after 2pm. Cloudy, with a high near 63. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Low around 51. Breezy. Chance of precipitation is 80%.
Columbus Day
Rain. High near 64. Breezy. Chance of precipitation is 80%.
Monday Night
Rain likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 65.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
A 30 percent chance of rain. Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 63.
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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:
9:05 pm EDT Oct 9, 2025
Forecast Valid:
12am EDT Oct 10, 2025-6pm EDT Oct 16, 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