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.

Light Drizzle

35°F

2°C

Humidity 93%
Wind Speed N 12 mph
Barometer 29.62 in (1003.0 mb)
Dewpoint 33°F (1°C)
Visibility 2.00 mi
Wind Chill27°F (-3°C)
Last update 20 Feb 7:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Winter Storm Watch February 22, 06:00am until February 23, 06:00pm
Coastal Flood Watch February 22, 10:00pm until February 23, 04:00am
Click here for hazard details and duration
Winter Storm Watch
Coastal Flood Watch

  • Tonight

    Tonight: A chance of rain before 1am, then a slight chance of rain and snow between 1am and 3am, then a slight chance of snow after 3am. Areas of fog before midnight. Otherwise, mostly cloudy, with a low around 31. Northeast wind around 6 mph becoming light and variable. Chance of precipitation is 30%.

    Low: 31 °F

    Slight Chance
    Rain and
    Areas Fog
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 44. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 44 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of rain before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 30. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: Snow likely, mainly after 1pm. Cloudy, with a high near 37. Wind chill values between 25 and 30. East wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Chance Snow
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow. Areas of blowing snow. Low around 28. Windy, with a north wind 18 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.

    Low: 28 °F

    Snow and
    Areas Blowing
    Snow

  • Monday

    Monday: Snow, mainly before 1pm. Areas of blowing snow before 1pm. High near 35. Windy. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    High: 35 °F

    Snow and
    Areas Blowing
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of rain before 1am, then a slight chance of rain and snow between 1am and 3am, then a slight chance of snow after 3am. Areas of fog before midnight. Otherwise, mostly cloudy, with a low around 31. Northeast wind around 6 mph becoming light and variable. Chance of precipitation is 30%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 44. Light and variable wind becoming northwest around 6 mph in the morning.
Saturday Night
A chance of rain before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 30. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 40%.
Sunday
Snow likely, mainly after 1pm. Cloudy, with a high near 37. Wind chill values between 25 and 30. East wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Snow. Areas of blowing snow. Low around 28. Windy, with a north wind 18 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.
Monday
Snow, mainly before 1pm. Areas of blowing snow before 1pm. High near 35. Windy. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 21.
Wednesday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 39.
Wednesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 32.
Thursday
Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
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:
5:24 pm EST Feb 20, 2026
Forecast Valid:
8pm EST Feb 20, 2026-6pm EST Feb 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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