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

69°F

21°C

Humidity 59%
Wind Speed W 6 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 1 Apr 3:56 pm EDT
Extended Forecast for

Centereach NY

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 70. Northwest wind around 7 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 41. Light northeast wind becoming east 5 to 10 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 46 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 59. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 59 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 60. Chance of precipitation is 80%.

    High: 60 °F

    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 70. Northwest wind around 7 mph. Chance of precipitation is 80%.
Tonight
Showers and possibly a thunderstorm. Low around 41. Light northeast wind becoming east 5 to 10 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 59. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 45.
Sunday
Showers, mainly after 8am. High near 60. Chance of precipitation is 80%.
Sunday Night
Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Sunny, with a high near 47.
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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:
2:31 pm EDT Apr 1, 2026
Forecast Valid:
4pm EDT Apr 1, 2026-6pm EDT Apr 8, 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