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

32°F

0°C

Humidity 45%
Wind Speed N 12 G 21 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 8 Dec 5:56 am EST
Extended Forecast for

Islip NY

  • Today

    Today: Partly sunny, with a temperature falling to around 26 by 5pm. Wind chill values between 15 and 20. North wind 10 to 15 mph, with gusts as high as 29 mph.

    High: 30 °F⇓

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 16. North wind 5 to 8 mph.

    Low: 16 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 37. Wind chill values between 15 and 25. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 37 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. Wind chill values between 25 and 30. Southwest wind 10 to 15 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 49. Southwest wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    High: 49 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a temperature falling to around 26 by 5pm. Wind chill values between 15 and 20. North wind 10 to 15 mph, with gusts as high as 29 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 16. North wind 5 to 8 mph.
Tuesday
Increasing clouds, with a high near 37. Wind chill values between 15 and 25. Light and variable wind becoming south 5 to 9 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 34. Wind chill values between 25 and 30. Southwest wind 10 to 15 mph, with gusts as high as 28 mph.
Wednesday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 49. Southwest wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 39.
Friday Night
A chance of rain and snow before 1am, then a chance of snow. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 36.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
4:40 am EST Dec 8, 2025
Forecast Valid:
6am EST Dec 8, 2025-6pm EST Dec 14, 2025
 
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Additional Resources

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Chance of Precipitation