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.

Overcast

62°F

17°C

Humidity 78%
Wind Speed SE 12 mph
Barometer 30.00 in (1015.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Oct 4:56 am EDT
Extended Forecast for

Islip NY

  • Overnight

    Overnight: Showers likely. Cloudy, with a steady temperature around 60. South wind around 9 mph. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

  • Friday

    Friday: Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 72. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 2am, then showers likely. Low around 46. Southwest wind 8 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Saturday

    Saturday: Showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 54. North wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. North wind 10 to 13 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

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

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers likely. Cloudy, with a steady temperature around 60. South wind around 9 mph. Chance of precipitation is 60%.
Friday
Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 72. Southwest wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 2am, then showers likely. Low around 46. Southwest wind 8 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 54. North wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 39. North wind 10 to 13 mph.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 44.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Partly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 61.
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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:
3:47 am EDT Oct 16, 2026
Forecast Valid:
5am EDT Oct 16, 2026-6pm EDT Oct 22, 2026
 
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