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

48°F

9°C

Humidity 71%
Wind Speed N 7 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 30 May 8:56 pm EDT
Extended Forecast for

Deep River CTSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 44. Light northwest wind.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 73. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 73 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 72. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers before 8pm. Mostly clear, with a low around 47. Light and variable wind.

    Low: 47 °F

    Chance
    Showers then
    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 44. Light northwest wind.
Sunday
Increasing clouds, with a high near 73. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 54. Calm wind.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 72. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers before 8pm. Mostly clear, with a low around 47. Light and variable wind.
Tuesday
A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 72.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Deep River CTSimilar City Names
 41.39°N 72.43°W (Elev. 49 ft)
Last Update:
8:38 pm EDT May 30, 2026
Forecast Valid:
9pm EDT May 30, 2026-6pm EDT Jun 6, 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