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.

Fog/Mist and Windy

29°F

-2°C

Humidity 92%
Wind Speed N 28 G 53 mph
Barometer 29.34 in (993.6 mb)
Dewpoint 27°F (-3°C)
Visibility 2.50 mi
Wind Chill14°F (-10°C)
Last update 23 Feb 4:56 am EST
Extended Forecast for

5 Miles SSE Bayport NY

Coastal Flood Advisory February 23, 11:00am until February 23, 06:00pm
Blizzard Warning February 23, 05:12am until February 23, 06:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Blizzard Warning
  •  
    Blizzard Warning February 23, 05:12am until February 23, 06:00pm

    NOW until 6:00pm Mon

    Blizzard Warning

  • Overnight

    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. High near 34. Wind chill values between 10 and 20. Very windy, with a north wind 41 to 46 mph decreasing to 31 to 36 mph in the afternoon. Winds could gust as high as 60 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 before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 23. Wind chill values between 10 and 20. Windy, with a northwest wind 25 to 32 mph.

    Low: 23 °F

    Windy. Chance
    Snow then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. Wind chill values between 10 and 15. Blustery, with a west wind 16 to 21 mph.

    High: 30 °F

    Mostly Sunny
    and Blustery
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow between 1am and 4am, then a chance of rain and snow. Mostly cloudy, with a temperature falling to near 25 by 8pm, then rising to around 33 during the remainder of the night. West wind 9 to 15 mph becoming south after midnight. Chance of precipitation is 50%.

    Low: 25 °F⇑

    Partly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 7am, then rain likely between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Breezy.
    Rain/Snow
    Likely then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of rain after 1pm. Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Areas of blowing snow. Low around 29. Wind chill values between 10 and 15. Very windy, with a north wind around 47 mph, with gusts as high as 60 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 13 to 19 inches possible.
Monday
Snow, mainly before 4pm. The snow could be heavy at times. Areas of blowing snow. High near 34. Wind chill values between 10 and 20. Very windy, with a north wind 41 to 46 mph decreasing to 31 to 36 mph in the afternoon. Winds could gust as high as 60 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Monday Night
A 30 percent chance of snow before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 23. Wind chill values between 10 and 20. Windy, with a northwest wind 25 to 32 mph.
Tuesday
Mostly sunny, with a high near 30. Wind chill values between 10 and 15. Blustery, with a west wind 16 to 21 mph.
Tuesday Night
A slight chance of snow between 1am and 4am, then a chance of rain and snow. Mostly cloudy, with a temperature falling to near 25 by 8pm, then rising to around 33 during the remainder of the night. West wind 9 to 15 mph becoming south after midnight. Chance of precipitation is 50%.
Wednesday
A chance of rain and snow before 7am, then rain likely between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 29.
Thursday
A 50 percent chance of rain after 1pm. Partly sunny, with a high near 40.
Thursday Night
Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 40.
Friday Night
Mostly clear, with a low around 32.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
Partly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Bayport NY
 40.68°N 73.02°W (Elev. 0 ft)
Last Update:
1:42 am EST Feb 23, 2026
Forecast Valid:
5am 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