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.

Fog/Mist

70°F

21°C

Humidity 100%
Wind Speed SE 8 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 70°F (21°C)
Visibility 2.00 mi
Last update 13 Jul 10:56 am EDT
Extended Forecast for

Groton CT

  • Today

    Today: Partly sunny, with a high near 72. Southeast wind 8 to 10 mph.

    High: 72 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy drizzle and fog after 10pm. Mostly cloudy, with a low around 69. Southeast wind 3 to 6 mph.

    Low: 69 °F

    Patchy
    Drizzle and
    Patchy Fog

  • Monday

    Monday: Mostly cloudy, with a high near 76. Calm wind becoming south 5 to 7 mph in the morning.

    High: 76 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph.

    Low: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind 3 to 7 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 73.

    Low: 73 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 72. Southeast wind 8 to 10 mph.
Tonight
Patchy drizzle and fog after 10pm. Mostly cloudy, with a low around 69. Southeast wind 3 to 6 mph.
Monday
Mostly cloudy, with a high near 76. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
A 20 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 71.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Mostly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 82.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
6:52 am EDT Jul 13, 2025
Forecast Valid:
11am EDT Jul 13, 2025-6pm EDT Jul 19, 2025
 
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