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.

A Few Clouds

62°F

17°C

Humidity 48%
Wind Speed N 7 mph
Barometer 30.15 in (1021.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 8 Oct 8:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Mostly clear, with a low around 49. North wind around 13 mph, with gusts as high as 23 mph.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 62. North wind 13 to 15 mph.

    High: 62 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy frost after 5am. Otherwise, clear, with a low around 40. Northeast wind 7 to 9 mph.

    Low: 40 °F

    Clear then
    Patchy Frost

  • Friday

    Friday: Patchy frost before 8am. Otherwise, sunny, with a high near 65. Northeast wind around 7 mph becoming south in the afternoon.

    High: 65 °F

    Patchy Frost
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51. South wind 3 to 6 mph.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance Rain

  • Sunday

    Sunday: A 50 percent chance of rain. Mostly cloudy, with a high near 67. Breezy.

    High: 67 °F

    Chance Rain
    and Breezy

  • Sunday Night

    Sunday Night: Rain likely. Mostly cloudy, with a low around 54. Windy. Chance of precipitation is 60%.

    Low: 54 °F

    Rain Likely
    and Windy

Detailed Forecast

Tonight
Mostly clear, with a low around 49. North wind around 13 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 62. North wind 13 to 15 mph.
Thursday Night
Patchy frost after 5am. Otherwise, clear, with a low around 40. Northeast wind 7 to 9 mph.
Friday
Patchy frost before 8am. Otherwise, sunny, with a high near 65. Northeast wind around 7 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a low around 51. South wind 3 to 6 mph.
Saturday
Partly sunny, with a high near 70.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 55.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 67. Breezy.
Sunday Night
Rain likely. Mostly cloudy, with a low around 54. Windy. Chance of precipitation is 60%.
Columbus Day
A 50 percent chance of rain. Mostly cloudy, with a high near 67. Windy.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 54. Breezy.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 68.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 70.
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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:
4:56 pm EDT Oct 8, 2025
Forecast Valid:
9pm EDT Oct 8, 2025-6pm EDT Oct 15, 2025
 
Forecast Discussion
 
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Additional Resources

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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