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.

Fair

36°F

2°C

Humidity 73%
Wind Speed SW 7 mph
Barometer 30.34 in (1027.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 25 Mar 3:56 am EDT
Extended Forecast for

Centereach NY

  • Today

    Today: Partly sunny, with a high near 51. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 51 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. South wind 5 to 11 mph.

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 57. South wind 8 to 14 mph.

    High: 57 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain, mainly after 2am. Low around 45. South wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Chance Rain
    then Rain

  • Friday

    Friday: Rain, mainly before 8am. High near 50. North wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 51. Calm wind becoming south 5 to 8 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 39. South wind 5 to 11 mph.
Thursday
Partly sunny, with a high near 57. South wind 8 to 14 mph.
Thursday Night
Rain, mainly after 2am. Low around 45. South wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain, mainly before 8am. High near 50. North wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Sunny, with a high near 47.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 52.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 55.
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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:
2:27 am EDT Mar 25, 2026
Forecast Valid:
4am EDT Mar 25, 2026-6pm EDT Mar 31, 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