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

40°F

4°C

Humidity 33%
Wind Speed W 17 G 33 mph
Barometer 29.40 in (995.5 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 15 Jan 1:56 pm EST
Extended Forecast for

Centereach NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 44. West wind around 14 mph, with gusts as high as 25 mph.

    High: 44 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Wind chill values between 10 and 20. 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.

    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, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • M.L.King Day

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

    High: 33 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 44. West wind around 14 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 20. Wind chill values between 10 and 20. 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.
Sunday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 36.
Sunday Night
Mostly cloudy, 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.
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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:
2pm EST Jan 15, 2026-6pm EST Jan 21, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation