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

39°F

4°C

Humidity 41%
Wind Speed NW 9 mph
Barometer 30.26 in (1024.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 14 Mar 9:56 pm EDT
Extended Forecast for

Fishers Island NY

  • Tonight

    Tonight: Mostly clear, with a low around 32. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 42. North wind 6 to 14 mph becoming southeast in the afternoon.

    High: 42 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers after 2am. Temperature rising to around 44 by 5am. Breezy, with an east wind 14 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F⇑

    Mostly Cloudy
    then Showers
    and Breezy

  • Monday

    Monday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 52. Windy, with a south wind 24 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 52 °F

    Heavy Rain
    and Windy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 36. Windy, with a south wind 34 to 38 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Heavy Rain
    and Windy

  • Tuesday

    Tuesday: Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 37 by 8am. Breezy. Chance of precipitation is 60%.

    High: 40 °F⇓

    Breezy.
    Showers
    Likely then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27. Breezy.

    Low: 27 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday
Partly sunny, with a high near 42. North wind 6 to 14 mph becoming southeast in the afternoon.
Sunday Night
Showers after 2am. Temperature rising to around 44 by 5am. Breezy, with an east wind 14 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 52. Windy, with a south wind 24 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 36. Windy, with a south wind 34 to 38 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 37 by 8am. Breezy. Chance of precipitation is 60%.
Tuesday Night
Mostly clear, with a low around 27. Breezy.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 44.
Friday Night
Partly cloudy, with a low around 36.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fishers Island NY
 41.27°N 72.01°W (Elev. 7 ft)
Last Update:
7:50 pm EDT Mar 14, 2026
Forecast Valid:
10pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation