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.

Mostly Cloudy

31°F

-1°C

Humidity 59%
Wind Speed S 8 mph
Barometer 29.61 in (1002.9 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 6 Feb 4:56 pm EST
Extended Forecast for

2 Miles NNW Stony Brook NY

Wind Advisory February 7, 09:00am until February 8, 12:00am
Extreme Cold Warning February 7, 01:00pm until February 8, 01:00pm
Click here for hazard details and duration
Wind Advisory
Extreme Cold Warning

  • Tonight

    Tonight: Snow, mainly after 10pm. Low around 16. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 16 °F

    Chance Snow
    then Snow

  • Saturday

    Saturday: Snow, mainly before 1pm. Temperature falling to around 14 by 5pm. Wind chill values between -5 and 5. Windy, with a northwest wind 13 to 18 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 25 °F⇓

    Snow and
    Windy

  • Saturday Night

    Saturday Night: Cloudy during the early evening, then gradual clearing, with a low around 5. Wind chill values between -10 and -15. Windy, with a northwest wind 21 to 29 mph, with gusts as high as 47 mph.

    Low: 5 °F

    Gradual
    Clearing and
    Windy

  • Sunday

    Sunday: Sunny and cold, with a high near 19. Wind chill values between -5 and -15. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.

    High: 19 °F

    Sunny and
    Blustery then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 8. Northwest wind 10 to 15 mph.

    Low: 8 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 25.

    High: 25 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow, mainly after 10pm. Low around 16. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.
Saturday
Snow, mainly before 1pm. Temperature falling to around 14 by 5pm. Wind chill values between -5 and 5. Windy, with a northwest wind 13 to 18 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday Night
Cloudy during the early evening, then gradual clearing, with a low around 5. Wind chill values between -10 and -15. Windy, with a northwest wind 21 to 29 mph, with gusts as high as 47 mph.
Sunday
Sunny and cold, with a high near 19. Wind chill values between -5 and -15. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 8. Northwest wind 10 to 15 mph.
Monday
Increasing clouds, with a high near 25.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 40%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 33.
Thursday Night
Partly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 33.
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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:
3:22 pm EST Feb 6, 2026
Forecast Valid:
5pm EST Feb 6, 2026-6pm EST Feb 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation