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

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles SSE South Lyme CT

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a low around 71. Light southwest wind.

    Low: 71 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms before 11am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 80 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Southwest wind 3 to 6 mph.

    Low: 71 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 83 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 72. Southwest wind 6 to 8 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 74. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a low around 71. Light southwest wind.
Tuesday
A 30 percent chance of showers and thunderstorms before 11am. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Southwest wind 3 to 6 mph.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 72. Southwest wind 6 to 8 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Thursday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 74. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 78.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 68.
Monday
Partly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
2:23 am EDT Jul 15, 2025
Forecast Valid:
5am EDT Jul 15, 2025-6pm EDT Jul 21, 2025
 
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