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

32°F

0°C

Humidity 96%
Wind Speed Calm
Barometer 30.01 in (1016.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 9 Mar 7:56 am EDT
Extended Forecast for

Groton CT

  • Today

    Today: Mostly sunny, with a high near 52. Southwest wind 5 to 9 mph.

    High: 52 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. Southwest wind around 7 mph.

    Low: 38 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. South wind 5 to 8 mph.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 40. South wind 3 to 6 mph.

    Low: 40 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 20 percent chance of showers after 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 50. Southeast wind 6 to 11 mph.

    High: 50 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.

    High: 53 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow before 8pm. Partly cloudy, with a low around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 52. Southwest wind 5 to 9 mph.
Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. Southwest wind around 7 mph.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. South wind 5 to 8 mph.
Tuesday Night
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 40. South wind 3 to 6 mph.
Wednesday
A 20 percent chance of showers after 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 50. Southeast wind 6 to 11 mph.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 47.
Thursday
Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow before 8pm. Partly cloudy, with a low around 32. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 42.
Friday Night
A 50 percent chance of rain after 8pm. Mostly cloudy, with a low around 37.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
7:50 am EDT Mar 9, 2026
Forecast Valid:
9am EDT Mar 9, 2026-6pm EDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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