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

N/A

Humidity NA
Wind Speed E 3 mph
Barometer 30.31 in
Dewpoint N/A
Visibility 7.00 mi
Last update 9 Jan 2:56 am EST
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of rain after 3pm. Increasing clouds, with a high near 52. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 52 °F

    Mostly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain before 10pm. Cloudy, with a low around 39. South wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 39 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Rain likely, mainly after 3pm. Cloudy, with a high near 46. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Slight Chance
    Rain then
    Rain Likely

  • Saturday Night

    Saturday Night: Rain. Low around 37. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: A chance of rain before noon, then a chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 45. Chance of precipitation is 50%.

    High: 45 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Monday Night

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

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 26. Calm wind.
Friday
A 40 percent chance of rain after 3pm. Increasing clouds, with a high near 52. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 50 percent chance of rain before 10pm. Cloudy, with a low around 39. South wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Saturday
Rain likely, mainly after 3pm. Cloudy, with a high near 46. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 37. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
A chance of rain before noon, then a chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 45. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
A 30 percent chance of showers. Cloudy, with a low around 31.
Thursday
A 30 percent chance of showers. Mostly cloudy, with a high near 39.
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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:
3:06 am EST Jan 9, 2026
Forecast Valid:
3am EST Jan 9, 2026-6pm EST Jan 15, 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