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

28°F

-2°C

Humidity 66%
Wind Speed W 16 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 19 Jan 10:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 16 to 18 mph, with gusts as high as 29 mph.

    High: 33 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 17. Wind chill values between 5 and 10. West wind 14 to 16 mph, with gusts as high as 29 mph.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 24. Wind chill values between 5 and 10. West wind 14 to 17 mph, with gusts as high as 30 mph.

    High: 24 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Wind chill values between 5 and 10. West wind 7 to 13 mph.

    Low: 14 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. South wind 6 to 14 mph.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a steady temperature around 35.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

M.L.King Day
Mostly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 16 to 18 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 17. Wind chill values between 5 and 10. West wind 14 to 16 mph, with gusts as high as 29 mph.
Tuesday
Sunny, with a high near 24. Wind chill values between 5 and 10. West wind 14 to 17 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 14. Wind chill values between 5 and 10. West wind 7 to 13 mph.
Wednesday
Mostly sunny, with a high near 38. South wind 6 to 14 mph.
Wednesday Night
Mostly cloudy, with a steady temperature around 35.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 11.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 21.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
9:44 am EST Jan 19, 2026
Forecast Valid:
11am EST Jan 19, 2026-6pm EST Jan 25, 2026
 
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