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

51°F

11°C

Humidity 38%
Wind Speed SE 13 mph
Barometer 30.49 in (1032.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 12 Apr 1:56 pm EDT
Extended Forecast for

Centereach NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 52. South wind around 10 mph.

    High: 52 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. South wind 6 to 9 mph.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Southwest wind 5 to 10 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers between 8pm and midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 52. South wind around 10 mph.
Tonight
Mostly cloudy, with a low around 43. South wind 6 to 9 mph.
Monday
A 20 percent chance of showers after 2pm. Mostly cloudy, with a high near 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 53. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.
Tuesday
Mostly sunny, with a high near 76. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
A chance of showers between 8pm and midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 67.
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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:
10:30 am EDT Apr 12, 2026
Forecast Valid:
2pm EDT Apr 12, 2026-6pm EDT Apr 18, 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