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.

Fair

37°F

3°C

Humidity 79%
Wind Speed W 7 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 20 Apr 2:56 am EDT
Extended Forecast for

2 Miles SSE South Lyme CT

Frost Advisory April 20, 03:52am until April 20, 08:00am
Freeze Warning April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Frost Advisory
Freeze Warning
  •  
    Frost Advisory April 20, 03:52am until April 20, 08:00am

    NOW until 8:00am Mon

    Frost Advisory

  • Overnight

    Low: 34 °F

    Frost

  • Monday

    Monday: A 20 percent chance of showers after 8am. Areas of frost before 8am. Otherwise, increasing clouds, with a high near 51. Calm wind becoming west around 6 mph in the morning.

    High: 51 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Widespread frost after 3am. Otherwise, partly cloudy, with a low around 32. North wind around 7 mph.

    Low: 32 °F

    Partly Cloudy
    then Frost

  • Tuesday

    Tuesday: Sunny, with a high near 50. North wind around 6 mph becoming light and variable.

    High: 50 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 2am. Increasing clouds, with a low around 39. South wind around 6 mph.

    Low: 39 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers before 8am. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

Detailed Forecast

Overnight
Widespread frost, mainly after 4am. Otherwise, clear, with a low around 34. Light west wind.
Monday
A 20 percent chance of showers after 8am. Areas of frost before 8am. Otherwise, increasing clouds, with a high near 51. Calm wind becoming west around 6 mph in the morning.
Monday Night
Widespread frost after 3am. Otherwise, partly cloudy, with a low around 32. North wind around 7 mph.
Tuesday
Sunny, with a high near 50. North wind around 6 mph becoming light and variable.
Tuesday Night
A 30 percent chance of showers after 2am. Increasing clouds, with a low around 39. South wind around 6 mph.
Wednesday
A 30 percent chance of showers before 8am. Mostly cloudy, with a high near 53.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Partly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 42.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 55.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 42.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 56.
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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:
2:20 am EDT Apr 20, 2026
Forecast Valid:
3am EDT Apr 20, 2026-6pm EDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation