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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: A chance of flurries. Cloudy, with a low around 18. Wind chill values between 10 and 15. West wind around 7 mph.

    Low: 18 °F

    Chance
    Flurries

  • Friday

    Friday: A chance of flurries before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 30. Wind chill values between 10 and 20. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 30 °F

    Chance
    Flurries

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19. Wind chill values between 10 and 15. West wind around 7 mph.

    Low: 19 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 6 to 9 mph.

    High: 31 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after 1am. Cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Cloudy then
    Chance Snow

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 33.

    High: 33 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Monday Night

    Monday Night: Cloudy, with a low around 25.

    Low: 25 °F

    Cloudy

Detailed Forecast

Overnight
A chance of flurries. Cloudy, with a low around 18. Wind chill values between 10 and 15. West wind around 7 mph.
Friday
A chance of flurries before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 30. Wind chill values between 10 and 20. West wind 7 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 19. Wind chill values between 10 and 15. West wind around 7 mph.
Saturday
Partly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 6 to 9 mph.
Saturday Night
A 30 percent chance of snow after 1am. Cloudy, with a low around 23. Calm wind.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Partly sunny, with a high near 34.
Monday Night
Cloudy, with a low around 25.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 44.
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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:
3:44 am EST Jan 2, 2026
Forecast Valid:
4am EST Jan 2, 2026-6pm EST Jan 8, 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