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

66°F

19°C

Humidity 70%
Wind Speed NW 3 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 16 Apr 2:56 am EDT
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. Light southwest wind.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the morning.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56. Southwest wind 3 to 8 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 76. Northwest wind 3 to 7 mph.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 51. Light east wind.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 8am. Cloudy, with a high near 58. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. Light southwest wind.
Thursday
Mostly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 56. Southwest wind 3 to 8 mph.
Friday
A 30 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 76. Northwest wind 3 to 7 mph.
Friday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 51. Light east wind.
Saturday
Partly sunny, with a high near 62.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47.
Sunday
Showers likely, mainly after 8am. Cloudy, with a high near 58. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Partly sunny, with a high near 63.
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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:
2:22 am EDT Apr 16, 2026
Forecast Valid:
3am EDT Apr 16, 2026-6pm EDT Apr 22, 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