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.

Heavy Rain Fog/Mist

57°F

14°C

Humidity 93%
Wind Speed E 15 G 28 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 55°F (13°C)
Visibility 2.00 mi
Last update 11 Oct 6:56 pm EDT
Extended Forecast for

Belle Terre NY

  • Tonight

    Tonight: Rain and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms, mainly between midnight and 5am. Low around 57. Breezy, with a northeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Rain and
    Breezy then
    Chance Rain

  • Columbus Day

    Columbus Day: Cloudy through mid morning, then gradual clearing, with a high near 69. North wind 6 to 15 mph.

    High: 69 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. North wind 3 to 6 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. East wind 5 to 8 mph becoming south in the afternoon.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 63. Southwest wind 10 to 13 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Rain and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms, mainly between midnight and 5am. Low around 57. Breezy, with a northeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
Cloudy through mid morning, then gradual clearing, with a high near 69. North wind 6 to 15 mph.
Monday Night
Mostly clear, with a low around 58. North wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 69. East wind 5 to 8 mph becoming south in the afternoon.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 63. Southwest wind 10 to 13 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 53.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50. Windy.
Saturday
Partly sunny, with a high near 56. Windy.
Saturday Night
Mostly cloudy, with a low around 42. Windy.
Sunday
Mostly sunny, with a high near 53. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Belle Terre NY
 40.95°N 73.05°W (Elev. 151 ft)
Last Update:
3:33 pm EDT Oct 11, 2026
Forecast Valid:
7pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
 
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