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

Hazardous Weather Conditions

Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

37°F

3°C

Humidity 79%
Wind Speed W 6 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 20 Apr 3:56 am EDT
Extended Forecast for

Old Saybrook Center CT

Frost Advisory April 20, 04:11am until April 20, 08:00am
Freeze Warning April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
...
Freeze Warning
  •  
    Frost Advisory April 20, 04:11am until April 20, 08:00am

    NOW until 8:00am Mon

    Frost Advisory

  • Today

    High: 50 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Wind chill values between 25 and 30. North wind around 8 mph.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 46. Wind chill values between 25 and 35 early. North wind around 6 mph becoming light and variable.

    High: 46 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 2am. Increasing clouds, with a low around 39. South wind around 8 mph.

    Low: 39 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 48. South wind 8 to 10 mph.

    High: 48 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Today
A 20 percent chance of showers after 8am. Areas of frost before 7am. Otherwise, increasing clouds, with a high near 50. West wind 3 to 6 mph.
Tonight
Partly cloudy, with a low around 31. Wind chill values between 25 and 30. North wind around 8 mph.
Tuesday
Sunny, with a high near 46. Wind chill values between 25 and 35 early. North wind around 6 mph becoming light and variable.
Tuesday Night
A 30 percent chance of showers after 2am. Increasing clouds, with a low around 39. South wind around 8 mph.
Wednesday
A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 48. South wind 8 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Partly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 56.
Friday Night
Partly cloudy, with a low around 42.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 51.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 43.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.39°W (Elev. 89 ft)
Last Update:
2:20 am EDT Apr 20, 2026
Forecast Valid:
4am EDT Apr 20, 2026-6pm EDT Apr 26, 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