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

44°F

7°C

Humidity 83%
Wind Speed NA
Barometer 30.19 in (1022.2 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 28 Apr 6:56 am EDT
Extended Forecast for

Groton / New London Airport CT

  • Today

    Today: Sunny, with a high near 61. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Southeast wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 58. Northeast wind 5 to 9 mph becoming southeast in the afternoon.

    High: 58 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Showers, mainly after 2am. Low around 45. East wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers, mainly before 2pm. High near 56. Light and variable wind becoming west 9 to 14 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 61. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 40. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Increasing clouds, with a high near 58. Northeast wind 5 to 9 mph becoming southeast in the afternoon.
Wednesday Night
Showers, mainly after 2am. Low around 45. East wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers, mainly before 2pm. High near 56. Light and variable wind becoming west 9 to 14 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 41.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton / New London Airport CT
 41.34°N 72.05°W (Elev. 49 ft)
Last Update:
2:19 am EDT Apr 28, 2026
Forecast Valid:
7am EDT Apr 28, 2026-6pm EDT May 4, 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