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

37°F

3°C

Humidity 89%
Wind Speed E 10 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 22 Feb 1:56 am EST
Extended Forecast for

Islip 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 after 4am. Cloudy, with a low around 31. East wind around 6 mph.

    Low: 31 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: A slight chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then snow after 1pm. High near 37. Wind chill values between 20 and 30. East wind 8 to 17 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 37 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Areas of blowing snow. Low around 29. Wind chill values between 15 and 20. Windy, with a northeast wind 22 to 27 mph increasing to 31 to 36 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: 29 °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 34. Wind chill values between 15 and 20. Windy, with a north wind 23 to 33 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 34 °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 20. Blustery, with a northwest wind 13 to 21 mph, with gusts as high as 32 mph.

    Low: 20 °F

    Chance Snow
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow after 1am. Increasing clouds, with a low around 19.

    Low: 19 °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 30.

    Low: 30 °F

    Chance Rain

Detailed Forecast

Overnight
A 20 percent chance of snow after 4am. Cloudy, with a low around 31. East wind around 6 mph.
Sunday
A slight chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then snow after 1pm. High near 37. Wind chill values between 20 and 30. East wind 8 to 17 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Areas of blowing snow. Low around 29. Wind chill values between 15 and 20. Windy, with a northeast wind 22 to 27 mph increasing to 31 to 36 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 34. Wind chill values between 15 and 20. Windy, with a north wind 23 to 33 mph, with gusts 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 20. Blustery, with a northwest wind 13 to 21 mph, with gusts as high as 32 mph.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
A 40 percent chance of snow after 1am. Increasing clouds, with a low around 19.
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 30.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 42.
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 39.
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 NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
2:07 am EST Feb 22, 2026
Forecast Valid:
2am EST Feb 22, 2026-6pm EST Feb 28, 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