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

31°F

-1°C

Humidity 61%
Wind Speed N 6 mph
Barometer 30.33 in (1026.9 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 21 Apr 4:56 am EDT
Extended Forecast for

Old Saybrook Center CT

Freeze Warning until April 21, 09:00am
Click here for hazard details and duration
Freeze Warning
  •  
    Freeze Warning until April 21, 09:00am

    NOW until 9:00am Tue

    Freeze Warning

  • Overnight

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Widespread frost before 7am. Otherwise, sunny, with a high near 45. Wind chill values between 25 and 35 early. North wind around 6 mph becoming light and variable.

    High: 45 °F

    Frost then
    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 5am. Increasing clouds, with a low around 39. South wind around 8 mph.

    Low: 39 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly between 8am and 2pm. Cloudy, with a high near 47. South wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 43. East wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 30. Wind chill values between 25 and 30. North wind around 7 mph.
Tuesday
Widespread frost before 7am. Otherwise, sunny, with a high near 45. 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 5am. Increasing clouds, with a low around 39. South wind around 8 mph.
Wednesday
Showers likely, mainly between 8am and 2pm. Cloudy, with a high near 47. South wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 43. East wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 54.
Friday Night
Partly cloudy, with a low around 41.
Saturday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 50.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 42.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 52.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 54.
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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:
2:19 am EDT Apr 21, 2026
Forecast Valid:
5am EDT Apr 21, 2026-6pm EDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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