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

75°F

24°C

Humidity 82%
Wind Speed Calm
Barometer 29.96 in (1014.6 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 9 Aug 9:56 pm EDT
Extended Forecast for

Old Saybrook Center CTSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 86 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. Southwest wind 3 to 5 mph.

    Low: 70 °F

    Chance
    Showers then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. West wind 3 to 8 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 66. Calm wind.
Monday
A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. Southwest wind 3 to 5 mph.
Tuesday
Sunny, with a high near 85. West wind 3 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CTSimilar City Names
 41.29°N 72.36°W (Elev. 3 ft)
Last Update:
2:26 pm EDT Aug 9, 2026
Forecast Valid:
10pm EDT Aug 9, 2026-6pm EDT Aug 16, 2026
 
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Additional Resources

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Chance of Precipitation