Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

22°F

-6°C

Humidity 40%
Wind Speed N 9 mph
Barometer 30.35 in (1027.6 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 5 Dec 3:56 am EST
Extended Forecast for

Belle Terre NY

  • Today

    Today: Increasing clouds, with a high near 35. Wind chill values between 15 and 25. Northeast wind around 6 mph becoming southeast in the morning.

    High: 35 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A slight chance of snow between 10pm and 11pm, then a chance of snow and freezing rain.  Mostly cloudy, with a steady temperature around 32. Light and variable wind becoming north around 5 mph after midnight.  Chance of precipitation is 30%.

    Low: 32 °F

    Chance Wintry
    Mix

  • Saturday

    Saturday: A slight chance of rain, snow, and freezing rain before 9am, then a slight chance of rain between 9am and 10am.  Mostly cloudy, with a high near 42. North wind 5 to 10 mph becoming southwest in the afternoon.  Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Wintry Mix
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind 10 to 13 mph.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 40. North wind 5 to 8 mph becoming southeast in the afternoon.

    High: 40 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A chance of rain and snow showers before 1am.  Mostly cloudy, with a low around 25. Chance of precipitation is 30%.

    Low: 25 °F

    Chance
    Rain/Snow

  • Monday

    Monday: Mostly sunny, with a high near 33. Breezy.

    High: 33 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 35. Wind chill values between 15 and 25. Northeast wind around 6 mph becoming southeast in the morning.
Tonight
A slight chance of snow between 10pm and 11pm, then a chance of snow and freezing rain. Mostly cloudy, with a steady temperature around 32. Light and variable wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.
Saturday
A slight chance of rain, snow, and freezing rain before 9am, then a slight chance of rain between 9am and 10am. Mostly cloudy, with a high near 42. North wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind 10 to 13 mph.
Sunday
Increasing clouds, with a high near 40. North wind 5 to 8 mph becoming southeast in the afternoon.
Sunday Night
A chance of rain and snow showers before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 33. Breezy.
Monday Night
Mostly clear, with a low around 23.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
Rain likely. Cloudy, with a low around 41. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 45. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Belle Terre NY
 40.96°N 73.08°W (Elev. 3 ft)
3:30 am EST Dec 5, 2025
4am EST Dec 5, 2025-6pm EST Dec 11, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database