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

34°F

1°C

Humidity 40%
Wind Speed NW 9 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 13 Feb 1:56 pm EST
Extended Forecast for

Islip NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 35. Northwest wind 6 to 8 mph.

    High: 35 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of snow showers after 4am. Mostly cloudy, with a low around 24. Calm wind becoming west around 5 mph after midnight.

    Low: 24 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers before 7am. Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 11 mph.

    High: 40 °F

    Chance Snow
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Light northwest wind.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 36. Calm wind becoming east around 6 mph.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Monday Night

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

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 35. Northwest wind 6 to 8 mph.
Tonight
A 30 percent chance of snow showers after 4am. Mostly cloudy, with a low around 24. Calm wind becoming west around 5 mph after midnight.
Saturday
A 30 percent chance of snow showers before 7am. Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 6 to 11 mph.
Saturday Night
Mostly clear, with a low around 24. Light northwest wind.
Sunday
Partly sunny, with a high near 36. Calm wind becoming east around 6 mph.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 27.
Washington's Birthday
Partly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 43.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
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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:
1:16 pm EST Feb 13, 2026
Forecast Valid:
2pm EST Feb 13, 2026-6pm EST Feb 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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