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.

Overcast

41°F

5°C

Humidity 67%
Wind Speed SW 6 mph
Barometer 30.01 in (1016.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 17 Jan 1:56 pm EST
Extended Forecast for

2 Miles SSE South Lyme CT

Winter Weather Advisory January 18, 10:00am until January 18, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Rain likely before 5pm, then rain and snow likely. Cloudy, with a high near 42. West wind around 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 42 °F

    Rain/Snow
    Likely

  • Tonight

    Tonight: Snow likely before 7pm, then a chance of snow after 4am. Mostly cloudy, with a low around 31. West wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 31 °F

    Snow Likely
    then Chance
    Snow

  • Sunday

    Sunday: Periods of snow, mainly after 7am. High near 35. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 35 °F

    Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight.

    Low: 25 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. West wind 6 to 15 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 15.

    Low: 15 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain likely before 5pm, then rain and snow likely. Cloudy, with a high near 42. West wind around 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Tonight
Snow likely before 7pm, then a chance of snow after 4am. Mostly cloudy, with a low around 31. West wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Sunday
Periods of snow, mainly after 7am. High near 35. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Sunday Night
A 50 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight.
M.L.King Day
Mostly sunny, with a high near 34. West wind 6 to 15 mph.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Mostly clear, with a low around 15.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 32.
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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:
1:04 pm EST Jan 17, 2026
Forecast Valid:
2pm EST Jan 17, 2026-6pm EST Jan 23, 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