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

75°F

24°C

Humidity 76%
Wind Speed S 8 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 5 Aug 10:56 am EDT
Extended Forecast for

2 Miles NNE Deep River CT

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 84. South wind 3 to 6 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 69. Calm wind.

    Low: 69 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Heat index values as high as 103. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 89 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms between 8pm and midnight. Partly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 90 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 84. South wind 3 to 6 mph.
Tonight
Increasing clouds, with a low around 69. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Heat index values as high as 103. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms between 8pm and midnight. Partly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Friday Night
A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 71.
Saturday
Partly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
A 40 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Deep River CT
 41.41°N 72.42°W (Elev. 3 ft)
Last Update:
11:59 am EDT Aug 5, 2026
Forecast Valid:
12pm EDT Aug 5, 2026-6pm EDT Aug 11, 2026
 
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