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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain Fog/Mist

35°F

2°C

Humidity 89%
Wind Speed Calm
Barometer 29.68 in (1005.1 mb)
Dewpoint 32°F (0°C)
Visibility 6.00 mi
Last update 11 Feb 1:56 am EST
Extended Forecast for

Islip NY

  • Overnight

    Overnight: Drizzle or freezing rain likely before 4am. Mostly cloudy, with a steady temperature around 36. West wind 3 to 5 mph. Chance of precipitation is 60%. Little or no ice accumulation expected.

    Low: 36 °F


    Drizzle/Freezing
    Rain Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39. Northwest wind 7 to 15 mph, with gusts as high as 26 mph.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 24. Wind chill values between 15 and 20. West wind around 13 mph, with gusts as high as 26 mph.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 35. Wind chill values between 15 and 25. Northwest wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 35 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19. Northwest wind around 7 mph.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Overnight
Drizzle or freezing rain likely before 4am. Mostly cloudy, with a steady temperature around 36. West wind 3 to 5 mph. Chance of precipitation is 60%. Little or no ice accumulation expected.
Wednesday
Mostly sunny, with a high near 39. Northwest wind 7 to 15 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 24. Wind chill values between 15 and 20. West wind around 13 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 35. Wind chill values between 15 and 25. Northwest wind 10 to 14 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 19. Northwest wind around 7 mph.
Friday
Sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Washington's Birthday
A 30 percent chance of rain. Partly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
1:42 am EST Feb 11, 2026
Forecast Valid:
2am EST Feb 11, 2026-6pm EST Feb 17, 2026
 
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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