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

33°F

1°C

Humidity 72%
Wind Speed N 6 mph
Barometer 30.03 in (1017.2 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 5 Dec 8:56 pm EST
Extended Forecast for

Islip NY

  • Tonight

    Tonight: A slight chance of drizzle, snow, and freezing rain before 1am, then a chance of drizzle or freezing rain between 1am and 2am, then a chance of drizzle after 2am. Cloudy, with a steady temperature around 33. Calm wind. Chance of precipitation is 30%.

    Low: 33 °F

    Chance Wintry
    Mix

  • Saturday

    Saturday: A chance of drizzle before 1pm. Cloudy, with a high near 42. Calm wind becoming west 5 to 8 mph in the morning.

    High: 42 °F

    Chance
    Drizzle

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. Northwest wind around 6 mph.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Wind chill values between 25 and 35. Northwest wind around 6 mph becoming southwest in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. Light west wind becoming northwest 5 to 9 mph in the evening.

    Low: 26 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of drizzle, snow, and freezing rain before 1am, then a chance of drizzle or freezing rain between 1am and 2am, then a chance of drizzle after 2am. Cloudy, with a steady temperature around 33. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of drizzle before 1pm. Cloudy, with a high near 42. Calm wind becoming west 5 to 8 mph in the morning.
Saturday Night
Partly cloudy, with a low around 28. Northwest wind around 6 mph.
Sunday
Partly sunny, with a high near 41. Wind chill values between 25 and 35. Northwest wind around 6 mph becoming southwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 26. Light west wind becoming northwest 5 to 9 mph in the evening.
Monday
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 45.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 41.
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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:
9:17 pm EST Dec 5, 2025
Forecast Valid:
9pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
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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