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Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

17°F

-8°C

Humidity 56%
Wind Speed N 15 G 23 mph
Barometer 29.98 in (1015.5 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 31 Jan 10:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Cold Weather Advisory January 31, 11:58pm until February 1, 10:00am
Coastal Flood Advisory February 1, 05:00am until February 1, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
Coastal Flood Advisory
  •  
    Cold Weather Advisory January 31, 11:58pm until February 1, 10:00am

    NOW until 10:00am Sun

    Cold Weather Advisory

  • Tonight

    Low: 14 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 23. Wind chill values between -5 and 5. North wind 14 to 17 mph, with gusts as high as 34 mph.

    High: 23 °F

    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14. Wind chill values between zero and 10. Northwest wind 9 to 11 mph, with gusts as high as 26 mph.

    Low: 14 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 30. Wind chill values between 5 and 15. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 30 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. Northwest wind 3 to 5 mph.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31.

    High: 31 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 14. Wind chill values between -5 and 5. North wind 9 to 14 mph, with gusts as high as 28 mph.
Sunday
Cloudy, with a high near 23. Wind chill values between -5 and 5. North wind 14 to 17 mph, with gusts as high as 34 mph.
Sunday Night
Mostly cloudy, with a low around 14. Wind chill values between zero and 10. Northwest wind 9 to 11 mph, with gusts as high as 26 mph.
Monday
Mostly sunny, with a high near 30. Wind chill values between 5 and 15. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 12. Northwest wind 3 to 5 mph.
Tuesday
Sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 18.
Wednesday
Partly sunny, with a high near 30.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
Mostly clear, with a low around 13.
Friday
Partly sunny, with a high near 30.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 15.
Saturday
Mostly sunny, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
1:05 pm EST Jan 31, 2026
Forecast Valid:
11pm EST Jan 31, 2026-6pm EST Feb 7, 2026
 
Forecast Discussion
 
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Additional Resources

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