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

31°F

-1°C

Humidity 59%
Wind Speed NW 8 mph
Barometer 30.35 in (1027.9 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 10 Feb 8:56 am EST
Extended Forecast for

Stony Brook NY

  • Today

    Today: Sunny, with a high near 35. Wind chill values between 25 and 30. Northwest wind around 9 mph.

    High: 35 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 22. Northwest wind 5 to 7 mph.

    Low: 22 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 34. Wind chill values between 15 and 25. Southwest wind 5 to 8 mph.

    High: 34 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow likely, mainly between 1am and 4am. Cloudy, with a low around 26. Wind chill values between 20 and 25. Southwest wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 26 °F

    Snow Likely

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly before 1pm. Cloudy, with a high near 34. Northeast wind 8 to 11 mph.

    High: 34 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Snow and sleet before 1am, then rain, snow, and sleet. Steady temperature around 32. Chance of precipitation is 100%. New snow and sleet accumulation of around an inch possible.

    Low: 32 °F

    Wintry Mix

  • Thursday

    Thursday: Rain likely before 1pm. Mostly cloudy, with a high near 41. Chance of precipitation is 60%.

    High: 41 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 35. Wind chill values between 25 and 30. Northwest wind around 9 mph.
Tonight
Mostly clear, with a low around 22. Northwest wind 5 to 7 mph.
Tuesday
Increasing clouds, with a high near 34. Wind chill values between 15 and 25. Southwest wind 5 to 8 mph.
Tuesday Night
Snow likely, mainly between 1am and 4am. Cloudy, with a low around 26. Wind chill values between 20 and 25. Southwest wind 5 to 8 mph becoming northeast after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Wednesday
A 30 percent chance of snow, mainly before 1pm. Cloudy, with a high near 34. Northeast wind 8 to 11 mph.
Wednesday Night
Snow and sleet before 1am, then rain, snow, and sleet. Steady temperature around 32. Chance of precipitation is 100%. New snow and sleet accumulation of around an inch possible.
Thursday
Rain likely before 1pm. Mostly cloudy, with a high near 41. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
Saturday Night
Rain. Low around 32. Chance of precipitation is 80%.
Sunday
Rain. High near 43. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
Last Update:
6:18 am EST Feb 10, 2025
Forecast Valid:
9am EST Feb 10, 2025-6pm EST Feb 16, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation