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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

29°F

-2°C

Humidity 39%
Wind Speed NW 13 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 14 Jan 6:56 pm EST
Extended Forecast for

Stony Brook NY

  • Tonight

    Tonight: Partly cloudy, with a low around 22. Wind chill values between 10 and 15. Breezy, with a west wind 16 to 20 mph.

    Low: 22 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 32. Wind chill values between 10 and 20. Northwest wind around 17 mph, with gusts as high as 29 mph.

    High: 32 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 21. Wind chill values between 10 and 15. Northwest wind 9 to 15 mph.

    Low: 21 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32. Wind chill values between 10 and 20. Southwest wind 6 to 10 mph.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23. West wind around 7 mph.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 44.

    High: 44 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before 1am. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 22. Wind chill values between 10 and 15. Breezy, with a west wind 16 to 20 mph.
Wednesday
Sunny, with a high near 32. Wind chill values between 10 and 20. Northwest wind around 17 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 21. Wind chill values between 10 and 15. Northwest wind 9 to 15 mph.
Thursday
Mostly sunny, with a high near 32. Wind chill values between 10 and 20. Southwest wind 6 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 23. West wind around 7 mph.
Friday
Sunny, with a high near 38.
Friday Night
Partly cloudy, with a low around 29.
Saturday
A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 44.
Saturday Night
A 40 percent chance of rain before 1am. Mostly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21.
M.L.King Day
A 30 percent chance of snow. Partly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Mostly sunny, with a high near 21.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
Last Update:
6:08 pm EST Jan 14, 2025
Forecast Valid:
7pm EST Jan 14, 2025-6pm EST Jan 21, 2025
 
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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