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

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

38°F

3°C

Humidity 62%
Wind Speed W 13 G 26 mph
Barometer 29.61 in (1002.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 17 Mar 5:56 am EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Wind Advisory March 17, 06:07am until March 17, 08:00am
Click here for hazard details and duration
...
  •  
    Wind Advisory March 17, 06:07am until March 17, 08:00am

    NOW until 8:00am Tue

    Wind Advisory

  • Today

    High: 42 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: A chance of flurries before 11pm. Partly cloudy, with a low around 24. Wind chill values between 15 and 20. Northwest wind 10 to 13 mph.

    Low: 24 °F

    Chance
    Flurries

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37. Wind chill values between 15 and 25. Northwest wind 6 to 9 mph.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. Light south wind.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 43. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 42. Wind chill values between 25 and 35. Breezy, with a west wind 17 to 22 mph, with gusts as high as 33 mph.
Tonight
A chance of flurries before 11pm. Partly cloudy, with a low around 24. Wind chill values between 15 and 20. Northwest wind 10 to 13 mph.
Wednesday
Mostly sunny, with a high near 37. Wind chill values between 15 and 25. Northwest wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 25. Light south wind.
Thursday
Mostly sunny, with a high near 43. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 33.
Friday
Partly sunny, with a high near 49.
Friday Night
A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 37.
Saturday
A 30 percent chance of rain before 2pm. Partly sunny, with a high near 50.
Saturday Night
A 30 percent chance of rain after 8pm. Mostly cloudy, with a low around 35.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 50.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 32.
Monday
Partly sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
4:00 am EDT Mar 17, 2026
Forecast Valid:
6am EDT Mar 17, 2026-6pm EDT Mar 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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