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/Mist

35°F

2°C

Humidity 93%
Wind Speed W 3 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 33°F (1°C)
Visibility 5.00 mi
Last update 17 Feb 7:56 pm EST
Extended Forecast for

2 Miles SSE South Lyme CT

Dense Fog Advisory February 17, 10:00pm until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Tonight

    Tonight: Areas of dense fog between 10pm and 4am. Areas of dense freezing fog after 4am. Otherwise, increasing clouds, with a low around 31. Calm wind.

    Low: 31 °F

    Areas Dense
    Freezing Fog
    and Areas
    Dense Fog

  • Wednesday

    Wednesday: A chance of drizzle before 10am, then rain, mainly after 10am. The drizzle could be heavy at times. Areas of dense fog between 7am and 10am. Areas of dense freezing fog before 7am. High near 39. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 39 °F

    Rain and
    Areas Dense
    Freezing Fog

  • Wednesday Night

    Wednesday Night: Rain likely, possibly mixing with snow after 10pm, then gradually ending. Cloudy, with a low around 31. Calm wind becoming northeast around 6 mph after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 31 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: Partly sunny, with a high near 39. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29. Calm wind becoming east around 5 mph after midnight.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday

    Friday: Rain, mainly after 1pm. High near 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 40 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 70%.

    Low: 32 °F

    Rain Likely

  • Saturday

    Saturday: Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Areas of dense fog between 10pm and 4am. Areas of dense freezing fog after 4am. Otherwise, increasing clouds, with a low around 31. Calm wind.
Wednesday
A chance of drizzle before 10am, then rain, mainly after 10am. The drizzle could be heavy at times. Areas of dense fog between 7am and 10am. Areas of dense freezing fog before 7am. High near 39. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely, possibly mixing with snow after 10pm, then gradually ending. Cloudy, with a low around 31. Calm wind becoming northeast around 6 mph after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Partly sunny, with a high near 39. Northeast wind around 6 mph becoming southeast in the afternoon.
Thursday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29. Calm wind becoming east around 5 mph after midnight.
Friday
Rain, mainly after 1pm. High near 40. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 70%.
Saturday
Mostly cloudy, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
A 50 percent chance of snow. Mostly cloudy, with a high near 37.
Sunday Night
Snow likely. Mostly cloudy, with a low around 27. Chance of precipitation is 60%.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 36.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
3:29 pm EST Feb 17, 2026
Forecast Valid:
8pm EST Feb 17, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation