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.

Fog

36°F

2°C

Humidity 97%
Wind Speed Calm
Barometer 30.02 in (1016.5 mb)
Dewpoint 35°F (2°C)
Visibility 0.25 mi
Last update 10 Mar 4:56 am EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Today

    Today: Patchy fog before 11am. Otherwise, partly sunny, with a high near 59. Calm wind becoming south around 6 mph in the afternoon.

    High: 59 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Areas of fog. Otherwise, mostly cloudy, with a low around 38. South wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Areas Fog

  • Wednesday

    Wednesday: Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 58. East wind 3 to 8 mph.

    High: 58 °F

    Areas Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Mostly cloudy, with a low around 46. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of rain before 5pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 41 by 5pm. West wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 47 °F⇓

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29.

    Low: 29 °F

    Chance Snow
    then Mostly
    Clear

  • Friday

    Friday: Increasing clouds, with a high near 44.

    High: 44 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, partly sunny, with a high near 59. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Areas of fog. Otherwise, mostly cloudy, with a low around 38. South wind around 5 mph becoming calm in the evening.
Wednesday
Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 58. East wind 3 to 8 mph.
Wednesday Night
A chance of rain before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of rain after 2am. Mostly cloudy, with a low around 46. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
A chance of rain before 5pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 41 by 5pm. West wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of snow before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29.
Friday
Increasing clouds, with a high near 44.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
Mostly cloudy, with a high near 49.
Sunday Night
Rain. Low around 41. Chance of precipitation is 80%.
Monday
Rain. High near 52. Chance of precipitation is 80%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
2:07 am EDT Mar 10, 2026
Forecast Valid:
5am EDT Mar 10, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation