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.

Fair

74°F

23°C

Humidity 64%
Wind Speed W 7 mph
Barometer 29.56 in (1000.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 12:56 am EDT
Extended Forecast for

Preston CT

  • Overnight

    Overnight: Partly cloudy, with a low around 64. West wind around 9 mph.

    Low: 64 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 82. West wind 9 to 17 mph, with gusts as high as 29 mph.

    High: 82 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. West wind around 9 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 31 mph.

    High: 81 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. West wind 5 to 8 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 81.

    High: 81 °F

    Sunny then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Showers likely, mainly after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 70%.

    High: 76 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. West wind around 9 mph.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 82. West wind 9 to 17 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 60. West wind around 9 mph.
Saturday
Sunny, with a high near 81. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 31 mph.
Saturday Night
Mostly clear, with a low around 59. West wind 5 to 8 mph.
Sunday
A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 81.
Sunday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 58.
Monday
Showers likely, mainly after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 70%.
Monday Night
Showers. Low around 60. Chance of precipitation is 80%.
Tuesday
Showers likely, mainly before 8am. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Preston CT
 41.53°N 71.98°W (Elev. 200 ft)
Last Update:
4:34 pm EDT Jun 18, 2026
Forecast Valid:
1am EDT Jun 19, 2026-6pm EDT Jun 25, 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