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.

Partly Cloudy

60°F

16°C

Humidity 35%
Wind Speed NW 16 G 25 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 1 Nov 3:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Northwest wind 7 to 15 mph.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 60. Northwest wind 6 to 9 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. Southwest wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after 2pm. Partly sunny, with a high near 62. South wind 5 to 13 mph.

    High: 62 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain before 2am. Partly cloudy, with a low around 47. Southwest wind around 11 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

    Low: 47 °F

    Chance Rain

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. Northwest wind 7 to 15 mph.
Sunday
Sunny, with a high near 60. Northwest wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 44. Southwest wind around 5 mph becoming calm in the evening.
Monday
A 30 percent chance of rain after 2pm. Partly sunny, with a high near 62. South wind 5 to 13 mph.
Monday Night
A 30 percent chance of rain before 2am. Partly cloudy, with a low around 47. Southwest wind around 11 mph becoming northwest after midnight. Winds could gust as high as 21 mph.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 40.
Friday
Partly sunny, with a high near 60.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 63.
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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:
3:53 pm EDT Nov 1, 2025
Forecast Valid:
4pm EDT Nov 1, 2025-6pm EST Nov 8, 2025
 
Forecast Discussion
 
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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