National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Islip Terrace NY

Wind Advisory December 30, 03:17am until December 30, 06:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 30, 03:17am until December 30, 06:00pm

    NOW until 6:00pm Tue

    Wind Advisory

  • Overnight

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 15 to 18 mph, with gusts as high as 47 mph.

    High: 32 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. Wind chill values between 15 and 20. West wind 10 to 14 mph, with gusts as high as 33 mph.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 35. Wind chill values between 15 and 25. West wind 10 to 13 mph.

    High: 35 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 23. Southwest wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Chance Snow

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 28. Wind chill values between 15 and 20. West wind around 15 mph, with gusts as high as 40 mph.
Tuesday
Partly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 15 to 18 mph, with gusts as high as 47 mph.
Tuesday Night
Partly cloudy, with a low around 23. Wind chill values between 15 and 20. West wind 10 to 14 mph, with gusts as high as 33 mph.
Wednesday
Partly sunny, with a high near 35. Wind chill values between 15 and 25. West wind 10 to 13 mph.
Wednesday Night
A 40 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 23. Southwest wind 7 to 9 mph, with gusts as high as 21 mph.
New Year's Day
Mostly sunny, with a high near 30.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 32.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 23.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
1:04 am EST Dec 30, 2025
Forecast Valid:
3am EST Dec 30, 2025-6pm EST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation