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.

Partly Cloudy

31°F

-1°C

Humidity 89%
Wind Speed Calm
Barometer 30.09 in (1018.9 mb)
Dewpoint 28°F (-2°C)
Visibility 7.00 mi
Last update 7 Dec 7:56 am EST
Extended Forecast for

Centereach NY

  • Today

    Today: Partly sunny, with a high near 42. Calm wind becoming south around 6 mph in the afternoon.

    High: 42 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Wind chill values between 15 and 20. West wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Wind chill values between 10 and 20. North wind 10 to 16 mph, with gusts as high as 30 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. North wind 5 to 8 mph becoming calm after midnight.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 40. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 40 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 42. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 23. Wind chill values between 15 and 20. West wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Monday
Mostly sunny, with a high near 31. Wind chill values between 10 and 20. North wind 10 to 16 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 15. North wind 5 to 8 mph becoming calm after midnight.
Tuesday
Increasing clouds, with a high near 40. Light and variable wind becoming south 5 to 10 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Saturday
A chance of rain and snow. Partly sunny, with a high near 34. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Centereach NY
 40.87°N 73.07°W (Elev. 98 ft)
Last Update:
7:42 am EST Dec 7, 2025
Forecast Valid:
7am EST Dec 7, 2025-6pm EST Dec 13, 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