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

37°F

3°C

Humidity 82%
Wind Speed Calm
Barometer 30.14 in (1020.6 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 8 Jan 7:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Today

    Today: Sunny, with a high near 46. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 46 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of rain after 4pm. Partly sunny, with a high near 49. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 49 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 7pm and 1am. Cloudy, with a steady temperature around 46. South wind 5 to 8 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Rain Likely

  • Saturday

    Saturday: Rain. Steady temperature around 46. Calm wind becoming northeast 5 to 8 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 46 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Sunday

    Sunday: A 40 percent chance of showers. Cloudy, with a high near 49.

    High: 49 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 46. Northwest wind around 6 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 32. Calm wind.
Friday
A 20 percent chance of rain after 4pm. Partly sunny, with a high near 49. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Rain likely, mainly between 7pm and 1am. Cloudy, with a steady temperature around 46. South wind 5 to 8 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. Steady temperature around 46. Calm wind becoming northeast 5 to 8 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 39. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers. Cloudy, with a high near 49.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
5:02 am EST Jan 8, 2026
Forecast Valid:
8am EST Jan 8, 2026-6pm EST Jan 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation