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.

A Few Clouds

26°F

-3°C

Humidity 42%
Wind Speed W 12 mph
Barometer 29.52 in (999.6 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 15 Jan 10:56 pm EST
Extended Forecast for

Centereach NY

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Wind chill values between 10 and 15. West wind 11 to 15 mph, with gusts as high as 29 mph.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 35. Wind chill values between 5 and 15. West wind 10 to 16 mph, with gusts as high as 30 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after 1am. Increasing clouds, with a low around 29. Southwest wind around 6 mph.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A chance of snow before 10am, then a chance of rain and snow between 10am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 41. Southwest wind 5 to 9 mph. Chance of precipitation is 50%.

    High: 41 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29. West wind 3 to 5 mph.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 21.

    Low: 21 °F

    Decreasing
    Clouds

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 33.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 20. Wind chill values between 10 and 15. West wind 11 to 15 mph, with gusts as high as 29 mph.
Friday
Sunny, with a high near 35. Wind chill values between 5 and 15. West wind 10 to 16 mph, with gusts as high as 30 mph.
Friday Night
A 20 percent chance of snow after 1am. Increasing clouds, with a low around 29. Southwest wind around 6 mph.
Saturday
A chance of snow before 10am, then a chance of rain and snow between 10am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 41. Southwest wind 5 to 9 mph. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 29. West wind 3 to 5 mph.
Sunday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 36.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 21.
M.L.King Day
Sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 13.
Wednesday
Mostly sunny, with a high near 31.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 35.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Centereach NY
 40.87°N 73.07°W (Elev. 98 ft)
Last Update:
12:42 pm EST Jan 15, 2026
Forecast Valid:
11pm EST Jan 15, 2026-6pm EST Jan 22, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation