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.

Overcast

71°F

22°C

Humidity 94%
Wind Speed NE 8 mph
Barometer 29.81 in (1009.6 mb)
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 17 Aug 2:56 pm EDT
Extended Forecast for

Preston CT

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 66. Light north wind.

    Low: 66 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 84. Calm wind becoming north around 5 mph.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 84 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers. Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 66. Light north wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 84. Calm wind becoming north around 5 mph.
Tuesday Night
Partly cloudy, with a low around 61. Calm wind.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 65. South wind around 5 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 83.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 60.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 60.
Saturday
A 50 percent chance of showers. Partly sunny, with a high near 78.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 63.
Sunday
Showers likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Preston CT
 41.55°N 72°W (Elev. 220 ft)
Last Update:
2:24 pm EDT Aug 17, 2026
Forecast Valid:
3pm EDT Aug 17, 2026-6pm EDT Aug 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