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

35°F

2°C

Humidity 89%
Wind Speed E 10 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 22 Feb 4:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Blizzard Warning February 22, 01:00pm until February 23, 06:00pm
Coastal Flood Warning February 22, 10:00pm until February 23, 04:00am
Click here for hazard details and duration
Blizzard Warning
Coastal Flood Warning

  • Overnight

    Overnight: A 20 percent chance of snow. Cloudy, with a low around 31. Wind chill values between 25 and 30. East wind around 8 mph.

    Low: 31 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Snow, mainly after 4pm. High near 37. Wind chill values between 20 and 25. Breezy, with an east wind 10 to 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 37 °F

    Chance Snow
    then Snow and
    Breezy

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Areas of blowing snow. Steady temperature around 32. Wind chill values between 15 and 20. Windy, with a northeast wind 24 to 29 mph increasing to 33 to 38 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 13 to 19 inches possible.

    Low: 32 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Monday

    Monday: Snow, mainly before 4pm. The snow could be heavy at times. Areas of blowing snow before 4pm. High near 33. Wind chill values between 15 and 20. Windy, with a northwest wind 31 to 36 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 33 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 21. Blustery, with a northwest wind 16 to 21 mph, with gusts as high as 34 mph.

    Low: 21 °F

    Chance Snow
    and Blustery
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow after 1am. Increasing clouds, with a low around 18.

    Low: 18 °F

    Partly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of snow before 8am, then a chance of rain and snow between 8am and 1pm, then a chance of rain after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.

    High: 39 °F

    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain. Partly cloudy, with a low around 29.

    Low: 29 °F

    Chance Rain

Detailed Forecast

Overnight
A 20 percent chance of snow. Cloudy, with a low around 31. Wind chill values between 25 and 30. East wind around 8 mph.
Sunday
Snow, mainly after 4pm. High near 37. Wind chill values between 20 and 25. Breezy, with an east wind 10 to 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Areas of blowing snow. Steady temperature around 32. Wind chill values between 15 and 20. Windy, with a northeast wind 24 to 29 mph increasing to 33 to 38 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 13 to 19 inches possible.
Monday
Snow, mainly before 4pm. The snow could be heavy at times. Areas of blowing snow before 4pm. High near 33. Wind chill values between 15 and 20. Windy, with a northwest wind 31 to 36 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Monday Night
A 30 percent chance of snow, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 21. Blustery, with a northwest wind 16 to 21 mph, with gusts as high as 34 mph.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
A 30 percent chance of snow after 1am. Increasing clouds, with a low around 18.
Wednesday
A chance of snow before 8am, then a chance of rain and snow between 8am and 1pm, then a chance of rain after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
Wednesday Night
A 30 percent chance of rain. Partly cloudy, with a low around 29.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 41.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 30.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 40.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
2:07 am EST Feb 22, 2026
Forecast Valid:
4am EST Feb 22, 2026-6pm EST Feb 28, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation