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

77°F

25°C

Humidity 100%
Wind Speed Calm
Barometer 30.07 in (1018.2 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 23 Jun 8:56 am EDT
Extended Forecast for

Groton CT

Heat Advisory June 23, 12:00pm until June 24, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. South wind 3 to 6 mph.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Light west wind becoming southwest 5 to 9 mph in the morning.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Northwest wind 5 to 7 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Northwest wind 5 to 7 mph becoming south in the afternoon.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers. Mostly cloudy, with a high near 68.

    High: 68 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 69. South wind 3 to 6 mph.
Tuesday
Sunny, with a high near 86. Light west wind becoming southwest 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 75. Northwest wind 5 to 7 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Northwest wind 5 to 7 mph becoming south in the afternoon.
Wednesday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 67.
Thursday
A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 72.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 68.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 64.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 64.
Sunday
Partly sunny, with a high near 73.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.34°N 72.08°W (Elev. 36 ft)
Last Update:
2:38 am EDT Jun 23, 2025
Forecast Valid:
9am EDT Jun 23, 2025-6pm EDT Jun 29, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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