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

50°F

10°C

Humidity 71%
Wind Speed S 12 G 21 mph
Barometer 30.27 in (1025.1 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 9 Jan 10:56 am EST
Extended Forecast for

Centereach NY

  • Today

    Today: Isolated showers after 4pm. Increasing clouds, with a high near 52. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 52 °F

    Isolated
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 9pm. Cloudy, with a low around 39. South wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Low: 39 °F

    Showers
    Likely 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. West wind 7 to 14 mph, with gusts as high as 24 mph. 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

  • Tuesday

    Tuesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Isolated showers after 4pm. Increasing clouds, with a high near 52. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
Showers likely, mainly before 9pm. Cloudy, with a low around 39. South wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
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. West wind 7 to 14 mph, with gusts as high as 24 mph. 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:
9:16 am EST Jan 9, 2026
Forecast Valid:
11am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
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Additional Resources

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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