Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

46°F

8°C

Humidity 79%
Wind Speed Calm
Barometer 30.01 in (1016.0 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 18 Oct 6:56 am EDT
Extended Forecast for

Belle Terre NY

  • Today

    Today: Sunny, with a high near 62. North wind 5 to 7 mph becoming calm  in the afternoon.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. South wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 68. South wind 7 to 16 mph, with gusts as high as 28 mph.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers, with thunderstorms also possible after 5am.  Steady temperature around 66. Windy, with a south wind 18 to 26 mph, with gusts as high as 40 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    Showers and
    Breezy then
    Showers and
    Windy

  • Monday

    Monday: Showers and possibly a thunderstorm before 11am, then a chance of showers.  High near 66. Windy, with a southeast wind 21 to 26 mph becoming southwest in the afternoon. Winds could gust as high as 39 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers and
    Windy then
    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. Breezy.

    Low: 55 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers.  Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers before 2pm.  Partly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 62. North wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 55. South wind around 6 mph.
Sunday
Mostly sunny, with a high near 68. South wind 7 to 16 mph, with gusts as high as 28 mph.
Sunday Night
Showers, with thunderstorms also possible after 5am. Steady temperature around 66. Windy, with a south wind 18 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm before 11am, then a chance of showers. High near 66. Windy, with a southeast wind 21 to 26 mph becoming southwest in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Partly cloudy, with a low around 55. Breezy.
Tuesday
Sunny, with a high near 65.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 57.
Wednesday
A 40 percent chance of showers before 2pm. Partly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 59.
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)
7:17 am EDT Oct 18, 2025
7am EDT Oct 18, 2025-6pm EDT Oct 24, 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