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.

Overcast

55°F

13°C

Humidity 93%
Wind Speed N 12 mph
Barometer 29.77 in (1008.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Oct 1:56 am EDT
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 55. North wind around 11 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Slight Chance
    T-storms

  • Columbus Day

    Columbus Day: Mostly cloudy through mid morning, then gradual clearing, with a high near 70. North wind 7 to 11 mph.

    High: 70 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. Light north wind.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning.

    High: 69 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Southwest wind around 9 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 2am. Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 55. North wind around 11 mph, with gusts as high as 21 mph.
Columbus Day
Mostly cloudy through mid morning, then gradual clearing, with a high near 70. North wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 56. Light north wind.
Tuesday
Increasing clouds, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Southwest wind around 9 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
A 50 percent chance of showers after 2am. Partly cloudy, with a low around 53.
Friday
Showers, mainly after 8am. High near 69. Chance of precipitation is 80%.
Friday Night
Showers likely. Mostly cloudy, with a low around 45. Breezy. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 54. Breezy.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Centereach NY
 40.87°N 73.07°W (Elev. 98 ft)
Last Update:
2:35 am EDT Oct 12, 2026
Forecast Valid:
3am EDT Oct 12, 2026-6pm EDT Oct 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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