Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Snow Fog/Mist

18°F

-8°C

Humidity 84%
Wind Speed N 9 mph
Barometer 29.77 in (1008.1 mb)
Dewpoint 14°F (-10°C)
Visibility 1.25 mi
Wind Chill7°F (-14°C)
Last update 26 Jan 7:56 am EST
Extended Forecast for

Islip NY

  • Today

    Today: A 40 percent chance of snow before 1pm.  Mostly cloudy, with a high near 31. Wind chill values between 15 and 20. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 31 °F

    Chance Snow

  • Tonight

    Tonight: Partly cloudy, with a low around 12. Wind chill values between zero and 10. West wind around 14 mph, with gusts as high as 28 mph.

    Low: 12 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 22. Wind chill values between zero and 10. West wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 11. Wind chill values between -5 and 5. West wind around 11 mph, with gusts as high as 24 mph.

    Low: 11 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23. West wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 6.

    Low: 6 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and cold, with a high near 20.

    High: 20 °F

    Cold

Detailed Forecast

Today
A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 31. Wind chill values between 15 and 20. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 12. Wind chill values between zero and 10. West wind around 14 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 22. Wind chill values between zero and 10. West wind 10 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 11. Wind chill values between -5 and 5. West wind around 11 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 23. West wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 9.
Thursday
Mostly sunny, with a high near 21.
Thursday Night
Mostly clear, with a low around 6.
Friday
Mostly sunny and cold, with a high near 20.
Friday Night
Mostly clear, with a low around 9.
Saturday
Sunny, with a high near 25.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Mostly sunny, with a high near 28.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
5:42 am EST Jan 26, 2026
8am EST Jan 26, 2026-6pm EST Feb 1, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database