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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.

Light Snow Fog/Mist Blowing Snow and Breezy

30°F

-1°C

Humidity 82%
Wind Speed NW 23 mph
Barometer 29.46 in (997.5 mb)
Dewpoint 25°F (-4°C)
Visibility 0.75 mi
Wind Chill17°F (-8°C)
Last update 23 Feb 1:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Coastal Flood Advisory until February 23, 06:00pm
Blizzard Warning February 23, 02:13pm until February 23, 06:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Blizzard Warning
  •  
    Coastal Flood Advisory until February 23, 06:00pm
    Blizzard Warning February 23, 02:13pm until February 23, 06:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 33 °F

    Areas Blowing
    Snow and
    Windy

  • Tonight

    Tonight: Patchy blowing snow. Cloudy, then gradually becoming partly cloudy, with a low around 20. Wind chill values between 10 and 15. Northwest wind 10 to 18 mph, with gusts as high as 33 mph.

    Low: 20 °F

    Patchy
    Blowing Snow

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. Wind chill values between 10 and 20. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow showers between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a temperature falling to near 19 by 10pm, then rising to around 29 during the remainder of the night. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 50%.

    Low: 19 °F⇑

    Partly Cloudy
    then Chance
    Snow Showers

  • Wednesday

    Wednesday: Snow likely, mixing with rain after 10am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 40. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow
    Likely

  • Wednesday Night

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

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain and snow after 1pm. Partly sunny, with a high near 37. Chance of precipitation is 50%.

    High: 37 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 27. Chance of precipitation is 70%.

    Low: 27 °F

    Snow Likely

Detailed Forecast

This Afternoon
Areas of blowing snow. Cloudy, with a high near 33. Wind chill values between 15 and 20. Windy, with a northwest wind 24 to 28 mph, with gusts as high as 43 mph.
Tonight
Patchy blowing snow. Cloudy, then gradually becoming partly cloudy, with a low around 20. Wind chill values between 10 and 15. Northwest wind 10 to 18 mph, with gusts as high as 33 mph.
Tuesday
Mostly sunny, with a high near 30. Wind chill values between 10 and 20. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of snow showers between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a temperature falling to near 19 by 10pm, then rising to around 29 during the remainder of the night. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 50%.
Wednesday
Snow likely, mixing with rain after 10am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 40. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
A chance of rain and snow after 1pm. Partly sunny, with a high near 37. Chance of precipitation is 50%.
Thursday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 27. Chance of precipitation is 70%.
Friday
Mostly sunny, with a high near 38.
Friday Night
Mostly clear, with a low around 26.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
12:58 pm EST Feb 23, 2026
Forecast Valid:
2pm EST Feb 23, 2026-6pm EST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation