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.

Partly Cloudy

73°F

23°C

Humidity 100%
Wind Speed SW 6 mph
Barometer 30.05 in (1017.4 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 14 Jul 5:56 pm EDT
Extended Forecast for

Preston CT

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 71. South wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 71 °F

    Chance
    T-storms then
    Showers
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly before 11am. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Patchy fog after midnight. Otherwise, increasing clouds, with a low around 70. South wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 88. Calm wind becoming south 5 to 8 mph in the morning.

    High: 88 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 72. Southwest wind 3 to 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    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 90.

    High: 90 °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 67.

    Low: 67 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 71. South wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly before 11am. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 70. South wind around 5 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 88. Calm wind becoming south 5 to 8 mph in the morning.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 72. Southwest wind 3 to 6 mph.
Thursday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 88. 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 90.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Preston CT
 41.53°N 72.01°W (Elev. 200 ft)
Last Update:
2:29 pm EDT Jul 14, 2025
Forecast Valid:
6pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025
 
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