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.

Overcast

44°F

7°C

Humidity 89%
Wind Speed S 3 mph
Barometer 29.72 in (1006.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 21 Mar 4:56 am EDT
Extended Forecast for

Fishers Island NY

  • Today

    Today: Mostly sunny, with a high near 48. Northwest wind 9 to 11 mph.

    High: 48 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. North wind around 7 mph becoming southeast after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 47. Southwest wind 11 to 14 mph.

    High: 47 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly after 8pm. Low around 38. Southwest wind 8 to 10 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain

  • Monday

    Monday: A chance of rain and snow before 2pm. Mostly cloudy, with a high near 41. North wind around 15 mph. Chance of precipitation is 40%.

    High: 41 °F

    Chance
    Rain/Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 48. Northwest wind 9 to 11 mph.
Tonight
Mostly cloudy, with a low around 39. North wind around 7 mph becoming southeast after midnight.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 47. Southwest wind 11 to 14 mph.
Sunday Night
Rain, mainly after 8pm. Low around 38. Southwest wind 8 to 10 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A chance of rain and snow before 2pm. Mostly cloudy, with a high near 41. North wind around 15 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
Sunny, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
Partly sunny, with a high near 44.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39. Breezy.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 45. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fishers Island NY
 41.27°N 72.01°W (Elev. 7 ft)
Last Update:
2:34 am EDT Mar 21, 2026
Forecast Valid:
5am EDT Mar 21, 2026-6pm EDT Mar 27, 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