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Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

23°F

-5°C

Humidity 54%
Wind Speed N 14 G 23 mph
Barometer 30.22 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 26 Dec 5:22 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Winter Storm Warning December 26, 04:00pm until December 27, 01:00pm
Click here for hazard details and duration
Winter Storm Warning

  • Today

    Today: A 30 percent chance of snow, mainly after 5pm. Increasing clouds, with a high near 31. Wind chill values between 10 and 20. North wind 5 to 8 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 31 °F

    Partly Sunny
    then Chance
    Snow

  • Tonight

    Tonight: Snow. The snow could be heavy at times. Temperature rising to around 29 by midnight. Calm wind becoming east 5 to 8 mph in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    Low: 25 °F⇑

    Heavy Snow

  • Saturday

    Saturday: A 40 percent chance of snow before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 33. Wind chill values between 20 and 25. Northeast wind 7 to 10 mph, with gusts as high as 22 mph.

    High: 33 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 20. Light north wind.

    Low: 20 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 41. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 41 °F

    Partly Sunny
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly after 7pm. Temperature rising to around 40 by 4am. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 33 °F⇑

    Rain

  • Monday

    Monday: Rain. High near 50. Chance of precipitation is 90%.

    High: 50 °F

    Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Today
A 30 percent chance of snow, mainly after 5pm. Increasing clouds, with a high near 31. Wind chill values between 10 and 20. North wind 5 to 8 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Tonight
Snow. The snow could be heavy at times. Temperature rising to around 29 by midnight. Calm wind becoming east 5 to 8 mph in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Saturday
A 40 percent chance of snow before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 33. Wind chill values between 20 and 25. Northeast wind 7 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 20. Light north wind.
Sunday
A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 41. Light and variable wind becoming west 5 to 7 mph in the morning.
Sunday Night
Rain, mainly after 7pm. Temperature rising to around 40 by 4am. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain. High near 50. Chance of precipitation is 90%.
Monday Night
Partly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 22.
New Year's Day
Partly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
Last Update:
1:48 am EST Dec 26, 2025
Forecast Valid:
5am EST Dec 26, 2025-6pm EST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation