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.

A Few Clouds

10°F

-12°C

Humidity 43%
Wind Speed N 14 G 28 mph
Barometer 30.55 in (1034.7 mb)
Dewpoint -8°F (-22°C)
Visibility 10.00 mi
Wind Chill-6°F (-21°C)
Last update 24 Jan 6:56 am EST
Extended Forecast for

Belle Terre NY

Cold Weather Advisory January 24, 07:23am until January 24, 12:00pm
Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Cold Weather Advisory January 24, 07:23am until January 24, 12:00pm

    NOW until 12:00pm Sat

    Cold Weather Advisory

  • Today

    High: 18 °F

    Mostly Sunny
    and Blustery
    then Mostly
    Sunny

  • Tonight

    Tonight: A 30 percent chance of snow after 4am. Mostly cloudy, with a low around 15. Wind chill values between 5 and 10. North wind 9 to 13 mph.

    Low: 15 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow, mainly after 7am. The snow could be heavy at times. High near 31. Wind chill values between zero and 10. Blustery, with a northeast wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    High: 31 °F

    Heavy Snow
    and Blustery

  • Sunday Night

    Sunday Night: Snow and sleet, becoming all snow after 4am. Steady temperature around 29. Wind chill values between 10 and 15. Windy, with a northeast wind 21 to 29 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 2 to 4 inches possible.

    Low: 29 °F

    Snow/Sleet
    and Windy

  • Monday

    Monday: Snow likely, mainly before 1pm. Cloudy, with a high near 30. Blustery, with a north wind 15 to 20 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 30 °F

    Snow Likely
    and Blustery

  • Monday Night

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

    Low: 16 °F

    Partly Cloudy
    and Windy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 21. Breezy.

    High: 21 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 15. Breezy.

    Low: 15 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

Today
Mostly sunny and cold, with a high near 18. Wind chill values between -5 and 5. Blustery, with a northwest wind 13 to 20 mph.
Tonight
A 30 percent chance of snow after 4am. Mostly cloudy, with a low around 15. Wind chill values between 5 and 10. North wind 9 to 13 mph.
Sunday
Snow, mainly after 7am. The snow could be heavy at times. High near 31. Wind chill values between zero and 10. Blustery, with a northeast wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Sunday Night
Snow and sleet, becoming all snow after 4am. Steady temperature around 29. Wind chill values between 10 and 15. Windy, with a northeast wind 21 to 29 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 2 to 4 inches possible.
Monday
Snow likely, mainly before 1pm. Cloudy, with a high near 30. Blustery, with a north wind 15 to 20 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday Night
Partly cloudy, with a low around 16. Windy.
Tuesday
Mostly sunny, with a high near 21. Breezy.
Tuesday Night
Partly cloudy, with a low around 15. Breezy.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Partly sunny, with a high near 22.
Thursday Night
Partly cloudy, with a low around 12. Blustery.
Friday
Mostly sunny, with a high near 23. Blustery.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belle Terre NY
 40.96°N 73.08°W (Elev. 3 ft)
Last Update:
1:05 am EST Jan 24, 2026
Forecast Valid:
7am EST Jan 24, 2026-6pm EST Jan 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation