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

36°F

2°C

Humidity 79%
Wind Speed E 8 mph
Barometer 30.46 in (1031.5 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 3 Mar 12:56 pm EST
Extended Forecast for

Belle Terre NY

  • This Afternoon

    This Afternoon: Rain. High near 38. East wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 38 °F

    Rain

  • Tonight

    Tonight: Rain, mainly before 1am. Low around 36. Southeast wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 42. West wind around 6 mph becoming calm in the afternoon.

    High: 42 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly before 1pm. Cloudy, with a high near 41. Northeast wind 3 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 41 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely. Cloudy, with a low around 38. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain Likely

  • Friday

    Friday: A 50 percent chance of rain before 1pm. Cloudy, with a high near 41.

    High: 41 °F

    Chance Rain

  • Friday Night

    Friday Night: Cloudy, with a low around 37.

    Low: 37 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 49.

    High: 49 °F

    Cloudy

Detailed Forecast

This Afternoon
Rain. High near 38. East wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly before 1am. Low around 36. Southeast wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Partly sunny, with a high near 42. West wind around 6 mph becoming calm in the afternoon.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 36. Calm wind.
Thursday
Rain likely, mainly before 1pm. Cloudy, with a high near 41. Northeast wind 3 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely. Cloudy, with a low around 38. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 50 percent chance of rain before 1pm. Cloudy, with a high near 41.
Friday Night
Cloudy, with a low around 37.
Saturday
Cloudy, with a high near 49.
Saturday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
Mostly cloudy, with a high near 54.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 56.
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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:
4:31 am EST Mar 3, 2026
Forecast Valid:
1pm EST Mar 3, 2026-6pm EDT Mar 9, 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