National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

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 35%
Wind Speed N 9 mph
Barometer 30.37 in (1028.4 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 18 Mar 11:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 37. Light and variable wind.

    High: 37 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 30. Light south wind.

    Low: 30 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 41. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35. Light south wind.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47. Southwest wind 3 to 7 mph.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

  • Saturday

    Saturday: A 40 percent chance of rain before 2pm. Partly sunny, with a high near 49.

    High: 49 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of rain after 8am. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

Detailed Forecast

This Afternoon
Partly sunny, with a high near 37. Light and variable wind.
Tonight
Increasing clouds, with a low around 30. Light south wind.
Thursday
Mostly sunny, with a high near 41. Calm wind becoming southeast 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 35. Light south wind.
Friday
Mostly sunny, with a high near 47. Southwest wind 3 to 7 mph.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Saturday
A 40 percent chance of rain before 2pm. Partly sunny, with a high near 49.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A 40 percent chance of rain after 8am. Mostly cloudy, with a high near 50.
Sunday Night
A 30 percent chance of rain before 2am. Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 46.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
6:17 am EDT Mar 18, 2026
Forecast Valid:
12pm EDT Mar 18, 2026-6pm EDT Mar 24, 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