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 Snow Fog/Mist Blowing Snow and Windy

30°F

-1°C

Humidity 85%
Wind Speed NW 29 mph
Barometer 29.41 in (995.8 mb)
Dewpoint 26°F (-3°C)
Visibility 0.75 mi
Wind Chill15°F (-9°C)
Last update 23 Feb 11:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

Coastal Flood Advisory until February 23, 06:00pm
Blizzard Warning February 23, 12:17pm 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, 12:17pm until February 23, 06:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 33 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Tonight

    Tonight: A 30 percent chance of snow before 7pm. Mostly cloudy, with a low around 23. Wind chill values between 10 and 20. Windy, with a northwest wind 25 to 33 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. Wind chill values between 15 and 20. West wind 9 to 15 mph becoming south after midnight. Chance of precipitation is 40%.

    Low: 25 °F⇑

    Partly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Rain and snow likely, becoming all rain after 10am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy, with a south wind 21 to 23 mph. 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

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 70%.

    Low: 33 °F

    Rain Likely

Detailed Forecast

This Afternoon
Snow, mainly before 4pm. The snow could be heavy at times. Areas of blowing snow. High near 33. Wind chill values between 15 and 20. Windy, with a northwest wind 32 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 4 to 8 inches possible.
Tonight
A 30 percent chance of snow before 7pm. Mostly cloudy, with a low around 23. Wind chill values between 10 and 20. Windy, with a northwest wind 25 to 33 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. Wind chill values between 15 and 20. West wind 9 to 15 mph becoming south after midnight. Chance of precipitation is 40%.
Wednesday
Rain and snow likely, becoming all rain after 10am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy, with a south wind 21 to 23 mph. 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 33.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
1:42 am EST Feb 23, 2026
Forecast Valid:
12pm EST Feb 23, 2026-6pm EST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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