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

60°F

16°C

Humidity 56%
Wind Speed SW 12 mph
Barometer 29.86 in (1011.0 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 26 Mar 2:56 pm EDT
Extended Forecast for

Centereach NY

  • Tonight

    Tonight: Showers, mainly after 8pm. Low around 48. Breezy, with a south wind 15 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Breezy.
    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers, mainly before 11am. Temperature falling to around 46 by 5pm. North wind 10 to 13 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F⇓

    Showers then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30. North wind 5 to 7 mph.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind 11 to 14 mph.

    High: 41 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. Northwest wind 5 to 10 mph becoming light in the evening.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers, mainly after 8pm. Low around 48. Breezy, with a south wind 15 to 24 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers, mainly before 11am. Temperature falling to around 46 by 5pm. North wind 10 to 13 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Mostly cloudy, with a low around 30. North wind 5 to 7 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind 11 to 14 mph.
Saturday Night
Partly cloudy, with a low around 28. Northwest wind 5 to 10 mph becoming light in the evening.
Sunday
Mostly sunny, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 55.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
A 30 percent chance of rain after 8am. Mostly cloudy, with a high near 55.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 59.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 59.
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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:
2:38 pm EDT Mar 26, 2026
Forecast Valid:
3pm EDT Mar 26, 2026-6pm EDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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