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.

Light Rain

53°F

12°C

Humidity 93%
Wind Speed SE 9 mph
Barometer 30.07 in (1018.4 mb)
Dewpoint 51°F (11°C)
Visibility 9.00 mi
Wind Chill50°F (10°C)
Last update 25 Nov 6:56 pm EST
Extended Forecast for

Belle Terre NY

  • Tonight

    Tonight: Rain, mainly before 4am. Temperature rising to around 56 by 1am. South wind 11 to 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 53 °F⇑

    Rain

  • Wednesday

    Wednesday: A chance of rain before 7am, then a chance of showers after 7am. Mostly cloudy, with a high near 59. Southwest wind 10 to 13 mph. Chance of precipitation is 50%.

    High: 59 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 41. Windy, with a west wind 11 to 21 mph increasing to 24 to 34 mph.

    Low: 41 °F

    Chance
    Showers and
    Windy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 44. Windy, with a west wind 28 to 31 mph.

    High: 44 °F

    Mostly Sunny
    and Windy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. Windy, with a west wind 32 to 37 mph.

    Low: 36 °F

    Mostly Clear
    and Windy

  • Friday

    Friday: Mostly sunny, with a high near 42. Windy.

    High: 42 °F

    Mostly Sunny
    and Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Windy.

    Low: 36 °F

    Mostly Clear
    and Windy

  • Saturday

    Saturday: Sunny, with a high near 42. Breezy.

    High: 42 °F

    Sunny and
    Breezy then
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain, mainly before 4am. Temperature rising to around 56 by 1am. South wind 11 to 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain before 7am, then a chance of showers after 7am. Mostly cloudy, with a high near 59. Southwest wind 10 to 13 mph. Chance of precipitation is 50%.
Wednesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 41. Windy, with a west wind 11 to 21 mph increasing to 24 to 34 mph.
Thanksgiving Day
Mostly sunny, with a high near 44. Windy, with a west wind 28 to 31 mph.
Thursday Night
Mostly clear, with a low around 36. Windy, with a west wind 32 to 37 mph.
Friday
Mostly sunny, with a high near 42. Windy.
Friday Night
Mostly clear, with a low around 36. Windy.
Saturday
Sunny, with a high near 42. Breezy.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 52.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 44.
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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:
4:54 pm EST Nov 25, 2025
Forecast Valid:
7pm EST Nov 25, 2025-6pm EST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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