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

65°F

18°C

Humidity 51%
Wind Speed SE 8 mph
Barometer 30.42 in (1030.2 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 10 Oct 4:56 pm EDT
Extended Forecast for

Centereach NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Southeast wind around 6 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: Periods of rain, mainly after noon. High near 61. East wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Periods of rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 59. East wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 59 °F

    Heavy Rain

  • Columbus Day

    Columbus Day: Rain likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 67. North wind 9 to 13 mph. Chance of precipitation is 60%.

    High: 67 °F

    Rain Likely
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. Light north wind.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. Southeast wind around 6 mph.
Sunday
Periods of rain, mainly after noon. High near 61. East wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Periods of rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 59. East wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Columbus Day
Rain likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 67. North wind 9 to 13 mph. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 56. Light north wind.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 51.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 63.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52.
Saturday
Partly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Centereach NY
 40.87°N 73.1°W (Elev. 105 ft)
Last Update:
3:14 pm EDT Oct 10, 2026
Forecast Valid:
5pm EDT Oct 10, 2026-6pm EDT Oct 17, 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