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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

32°F

0°C

Humidity 50%
Wind Speed SW 9 mph
Barometer 30.08 in (1018.8 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 9 Dec 4:56 pm EST
Extended Forecast for

Belle Terre NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Southwest wind 11 to 16 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain, mainly after 10am. High near 47. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Breezy.
    Slight Chance
    Rain then
    Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly before 7pm. Low around 32. Breezy, with a southwest wind 18 to 21 mph. Chance of precipitation is 80%.

    Low: 32 °F

    Breezy. Rain
    then Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 37. Wind chill values between 20 and 25. Breezy, with a west wind 22 to 25 mph, with gusts as high as 36 mph.

    High: 37 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26. Breezy, with a west wind 21 to 25 mph, with gusts as high as 36 mph.

    Low: 26 °F

    Partly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 37. Breezy.

    High: 37 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of light snow after 1am. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy
    then Chance
    Light Snow

  • Saturday

    Saturday: Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. Southwest wind 11 to 16 mph.
Wednesday
Rain, mainly after 10am. High near 47. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain, mainly before 7pm. Low around 32. Breezy, with a southwest wind 18 to 21 mph. Chance of precipitation is 80%.
Thursday
Mostly sunny, with a high near 37. Wind chill values between 20 and 25. Breezy, with a west wind 22 to 25 mph, with gusts as high as 36 mph.
Thursday Night
Partly cloudy, with a low around 26. Breezy, with a west wind 21 to 25 mph, with gusts as high as 36 mph.
Friday
Mostly sunny, with a high near 37. Breezy.
Friday Night
A 30 percent chance of light snow after 1am. Mostly cloudy, with a low around 27.
Saturday
Mostly cloudy, with a high near 41.
Saturday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29.
Sunday
A chance of snow, mixing with rain after 9am, then gradually ending. Partly sunny, with a high near 37. Breezy. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 19. Blustery.
Monday
Mostly sunny, with a high near 31. Blustery.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 33.
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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:
3:34 pm EST Dec 9, 2025
Forecast Valid:
5pm EST Dec 9, 2025-6pm EST Dec 16, 2025
 
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