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

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

27°F

-3°C

Humidity 51%
Wind Speed N 15 mph
Barometer 30.15 in (1021.1 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 13 Feb 9:56 am EST
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Today

    Today: Sunny, with a high near 34. Wind chill values between 15 and 25. West wind 9 to 13 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Scattered snow showers, mainly after 1am. Increasing clouds, with a low around 24. West wind 5 to 7 mph. Chance of precipitation is 50%.

    Low: 24 °F

    Slight Chance
    Snow Showers
    then
    Scattered
    Snow Showers

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 39. Wind chill values between 20 and 30. West wind 8 to 10 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. West wind around 6 mph.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 36. North wind around 7 mph becoming east in the afternoon.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Monday Night

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

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 34. Wind chill values between 15 and 25. West wind 9 to 13 mph.
Tonight
Scattered snow showers, mainly after 1am. Increasing clouds, with a low around 24. West wind 5 to 7 mph. Chance of precipitation is 50%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 39. Wind chill values between 20 and 30. West wind 8 to 10 mph.
Saturday Night
Partly cloudy, with a low around 25. West wind around 6 mph.
Sunday
Partly sunny, with a high near 36. North wind around 7 mph becoming east in the afternoon.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 28.
Washington's Birthday
Partly sunny, with a high near 39.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 45.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
Last Update:
5:10 am EST Feb 13, 2026
Forecast Valid:
10am EST Feb 13, 2026-6pm EST Feb 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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