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.

A Few Clouds

43°F

6°C

Humidity 27%
Wind Speed NW 20 G 30 mph
Barometer 30.29 in (1025.9 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 7 Apr 6:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Mostly clear, with a low around 27. Wind chill values between 20 and 25. Blustery, with a north wind 11 to 21 mph.

    Low: 27 °F

    Mostly Clear
    and Blustery
    then Clear

  • Wednesday

    Wednesday: Sunny, with a high near 47. Wind chill values between 20 and 30 early. North wind 7 to 9 mph becoming southeast in the afternoon.

    High: 47 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 33. Southeast wind around 6 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 50. Light southeast wind increasing to 5 to 10 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. Southeast wind around 6 mph becoming calm in the evening.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 27. Wind chill values between 20 and 25. Blustery, with a north wind 11 to 21 mph.
Wednesday
Sunny, with a high near 47. Wind chill values between 20 and 30 early. North wind 7 to 9 mph becoming southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 33. Southeast wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 50. Light southeast wind increasing to 5 to 10 mph in the morning.
Thursday Night
Partly cloudy, with a low around 38. Southeast wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 58.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 63.
Monday Night
Mostly cloudy, with a low around 52.
Tuesday
Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
6:49 pm EDT Apr 7, 2026
Forecast Valid:
7pm EDT Apr 7, 2026-6pm EDT Apr 14, 2026
 
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Additional Resources

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