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

9°C

49°F

Humidity 90%
Wind Speed E 6 km/h
Barometer 1023.8 mb (30.23 in)
Dewpoint 8°C (46°F)
Visibility 16 km
Last update 9 Oct 9:56 pm EDT
Extended Forecast for

3 Miles SSW Niantic CT

  • Tonight

    Tonight: Partly cloudy, with a low around 8. Calm wind.

    Low: 8 °C

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 18. North wind 5 to 8 km/h becoming south in the afternoon.

    High: 18 °C

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10. Calm wind.

    Low: 10 °C

    Partly Cloudy

  • Sunday

    Sunday: Rain likely after 2pm. Mostly cloudy, with a high near 18. Southeast wind 5 to 14 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New precipitation amounts between 2.5 and 5 mm possible.

    High: 18 °C

    Mostly Cloudy
    then Rain
    Likely

  • Sunday Night

    Sunday Night: Periods of rain, with thunderstorms also possible after 2am. Low around 16. East wind 16 to 18 km/h, with gusts as high as 40 km/h. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 cm possible.

    Low: 16 °C

    Rain

  • Columbus Day

    Columbus Day: Cloudy, then gradually becoming mostly sunny, with a high near 21.

    High: 21 °C

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14.

    Low: 14 °C

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 19.

    High: 19 °C

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 12. Chance of precipitation is 60%.

    Low: 12 °C

    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 8. Calm wind.
Saturday
Mostly sunny, with a high near 18. North wind 5 to 8 km/h becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 10. Calm wind.
Sunday
Rain likely after 2pm. Mostly cloudy, with a high near 18. Southeast wind 5 to 14 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New precipitation amounts between 2.5 and 5 mm possible.
Sunday Night
Periods of rain, with thunderstorms also possible after 2am. Low around 16. East wind 16 to 18 km/h, with gusts as high as 40 km/h. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 cm possible.
Columbus Day
Cloudy, then gradually becoming mostly sunny, with a high near 21.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 19.
Tuesday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 12. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 17.
Wednesday Night
Mostly clear, with a low around 8.
Thursday
Sunny, with a high near 16.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 10.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 17.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Niantic CT
 41.29°N 72.21°W (Elev. 3 m)
Last Update:
7:49 pm EDT Oct 9, 2026
Forecast Valid:
10pm EDT Oct 9, 2026-6pm EDT Oct 16, 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