Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

36°F

2°C

Humidity 73%
Wind Speed W 5 mph
Barometer 29.92 in (1013.3 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 6 Dec 7:56 pm EST
Extended Forecast for

Belle Terre NY

  • Tonight

    Tonight: Mostly clear, with a low around 35. Northwest wind 8 to 13 mph.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 41. North wind 5 to 7 mph becoming south in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Wind chill values between 20 and 25. Blustery, with a southwest wind 9 to 14 mph becoming northwest 16 to 21 mph after midnight.

    Low: 28 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Blustery

  • Monday

    Monday: Mostly sunny, with a high near 31. Wind chill values between 15 and 20. Blustery, with a north wind 18 to 23 mph.

    High: 31 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23. North wind 7 to 17 mph.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 39.

    High: 39 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain.  Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain.  Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 35. Northwest wind 8 to 13 mph.
Sunday
Partly sunny, with a high near 41. North wind 5 to 7 mph becoming south in the afternoon.
Sunday Night
Partly cloudy, with a low around 28. Wind chill values between 20 and 25. Blustery, with a southwest wind 9 to 14 mph becoming northwest 16 to 21 mph after midnight.
Monday
Mostly sunny, with a high near 31. Wind chill values between 15 and 20. Blustery, with a north wind 18 to 23 mph.
Monday Night
Partly cloudy, with a low around 23. North wind 7 to 17 mph.
Tuesday
Increasing clouds, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 47.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39.
Thursday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 42.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 39.
Friday Night
A 30 percent chance of snow. Partly cloudy, with a low around 28. Blustery.
Saturday
Mostly sunny, with a high near 34. 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)
4:40 pm EST Dec 6, 2025
8pm EST Dec 6, 2025-6pm EST Dec 13, 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