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.

Partly Cloudy

31°F

-1°C

Humidity 52%
Wind Speed NW 17 G 29 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 12 Feb 10:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Today

    Today: Partly sunny, with a high near 36. Wind chill values between 20 and 25. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 31 mph.

    High: 36 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 19. Wind chill values between 10 and 15. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 35. Wind chill values between 10 and 20. Northwest wind 8 to 14 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow showers, mainly after 10pm. Increasing clouds, with a low around 25. Wind chill values between 20 and 25. West wind around 7 mph.

    Low: 25 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 40. West wind 8 to 13 mph.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °F

    Chance
    Rain/Snow

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 36. Wind chill values between 20 and 25. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 31 mph.
Tonight
Partly cloudy, with a low around 19. Wind chill values between 10 and 15. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 35. Wind chill values between 10 and 20. Northwest wind 8 to 14 mph.
Friday Night
A 30 percent chance of snow showers, mainly after 10pm. Increasing clouds, with a low around 25. Wind chill values between 20 and 25. West wind around 7 mph.
Saturday
Mostly sunny, with a high near 40. West wind 8 to 13 mph.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Mostly cloudy, with a high near 39.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Washington's Birthday
Mostly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 44.
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Forecast Area
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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:
5:34 am EST Feb 12, 2026
Forecast Valid:
11am EST Feb 12, 2026-6pm EST Feb 18, 2026
 
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Additional Resources

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