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.

Overcast

36°F

2°C

Humidity 76%
Wind Speed N 5 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 5 Dec 11:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: A slight chance of drizzle or freezing rain before 1am, then a chance of freezing rain between 1am and 2am, then a chance of drizzle after 2am. Cloudy, with a steady temperature around 32. Calm wind. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Drizzle/Freezing
    Rain

  • Saturday

    Saturday: A chance of drizzle before 1pm. Cloudy, with a high near 44. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 44 °F

    Chance
    Drizzle

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29. West wind 6 to 8 mph.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 43. Wind chill values between 25 and 35. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 43 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of rain between 1am and 4am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 27. West wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Monday

    Monday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of drizzle or freezing rain before 1am, then a chance of freezing rain between 1am and 2am, then a chance of drizzle after 2am. Cloudy, with a steady temperature around 32. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of drizzle before 1pm. Cloudy, with a high near 44. Light and variable wind becoming west 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 29. West wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 43. Wind chill values between 25 and 35. Northwest wind around 7 mph becoming southwest in the afternoon.
Sunday Night
A slight chance of rain between 1am and 4am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 27. West wind 5 to 10 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 45.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 41.
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
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
9:17 pm EST Dec 5, 2025
Forecast Valid:
12am EST Dec 6, 2025-6pm EST Dec 12, 2025
 
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