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.

A Few Clouds

19°F

-7°C

Humidity 74%
Wind Speed Calm
Barometer 30.65 in (1037.9 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 2 Mar 11:56 pm EST
Extended Forecast for

Centereach NY

  • Overnight

    Overnight: Increasing clouds, with a temperature rising to around 26 by 5am. Calm wind.

    Low: 22 °F⇑

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain likely, possibly mixed with snow before 1pm, then rain. High near 40. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. Steady temperature around 39. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 46. Light and variable wind.

    High: 46 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain, mainly after 1am. Low around 36. Chance of precipitation is 80%.

    Low: 36 °F

    Chance Rain
    then Rain

  • Friday

    Friday: A 50 percent chance of rain before 1pm. Cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Increasing clouds, with a temperature rising to around 26 by 5am. Calm wind.
Tuesday
Rain likely, possibly mixed with snow before 1pm, then rain. High near 40. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday Night
Rain. Steady temperature around 39. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 46. Light and variable wind.
Wednesday Night
A 40 percent chance of rain, mainly after 1am. Mostly cloudy, with a low around 34. Calm wind.
Thursday
A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.
Thursday Night
Rain, mainly after 1am. Low around 36. Chance of precipitation is 80%.
Friday
A 50 percent chance of rain before 1pm. Cloudy, with a high near 44.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Mostly cloudy, with a high near 49.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 41.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 56.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Monday
Mostly cloudy, with a high near 54.
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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:
1:04 pm EST Mar 2, 2026
Forecast Valid:
12am EST Mar 3, 2026-6pm EDT Mar 9, 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