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

23°F

-5°C

Humidity 60%
Wind Speed NW 7 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 2 Feb 11:56 pm EST
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: Mostly clear, with a low around 12. Calm wind.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. Wind chill values between 10 and 20. Calm wind becoming west 5 to 7 mph in the morning.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of light snow between 1am and 4am. Mostly cloudy, with a low around 19. Calm wind. Chance of precipitation is 20%.

    Low: 19 °F

    Mostly Cloudy
    then Slight
    Chance Light
    Snow

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 34. Wind chill values between 20 and 30. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 34 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15. Calm wind.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 12. Calm wind.
Tuesday
Mostly sunny, with a high near 34. Wind chill values between 10 and 20. Calm wind becoming west 5 to 7 mph in the morning.
Tuesday Night
A slight chance of light snow between 1am and 4am. Mostly cloudy, with a low around 19. Calm wind. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 34. Wind chill values between 20 and 30. Calm wind becoming northwest 5 to 8 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 15. Calm wind.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 11.
Friday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 30.
Friday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 8.
Saturday
Mostly sunny and cold, with a high near 17. Blustery.
Saturday Night
Partly cloudy, with a low around 5. Blustery.
Sunday
Partly sunny and cold, with a high near 19.
Sunday Night
Partly cloudy, with a low around 7.
Monday
Mostly sunny, with a high near 22.
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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:
1:22 pm EST Feb 2, 2026
Forecast Valid:
12am EST Feb 3, 2026-6pm EST Feb 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