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.

Mostly Cloudy

40°F

4°C

Humidity 25%
Wind Speed N 9 mph
Barometer 30.40 in (1029.4 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 28 Mar 4:56 pm EDT
Extended Forecast for

Centereach NY

  • Tonight

    Tonight: Mostly clear, with a low around 29. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 25 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 48. Light southwest wind increasing to 8 to 13 mph in the morning.

    High: 48 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 58. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 58 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southwest wind 5 to 7 mph.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain after 2pm. Partly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 25 mph.
Sunday
Sunny, with a high near 48. Light southwest wind increasing to 8 to 13 mph in the morning.
Sunday Night
Increasing clouds, with a low around 40. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Monday
Partly sunny, with a high near 58. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.
Monday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southwest wind 5 to 7 mph.
Tuesday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
A 40 percent chance of rain after 2pm. Partly sunny, with a high near 64.
Wednesday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 47.
Thursday Night
Rain and snow likely. Cloudy, with a low around 35. Chance of precipitation is 60%.
Friday
Rain and snow likely. Cloudy, with a high near 46. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 37. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
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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:
2:35 pm EDT Mar 28, 2026
Forecast Valid:
5pm EDT Mar 28, 2026-6pm EDT Apr 4, 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