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.

Mostly Cloudy

36°F

2°C

Humidity 28%
Wind Speed W 15 G 28 mph
Barometer 30.06 in (1018.1 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 23 Jan 2:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

Cold Weather Advisory January 23, 10:00pm until January 24, 12:00pm
Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning

  • Tonight

    Tonight: Mostly cloudy, with a low around 12. Wind chill values between -5 and 5. Windy, with a northwest wind 24 to 32 mph.

    Low: 12 °F

    Mostly Cloudy
    and Windy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19. Wind chill values between -10 and zero. Blustery, with a northwest wind 17 to 24 mph.

    High: 19 °F

    Cold and
    Blustery

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly after 4am. Cloudy, with a low around 16. Wind chill values between 5 and 10. North wind 11 to 14 mph.

    Low: 16 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow, mainly after 7am. The snow could be heavy at times. High near 33. Wind chill values between 5 and 15. Windy, with a northeast wind 14 to 19 mph increasing to 25 to 30 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    High: 33 °F

    Heavy Snow
    and Windy

  • Sunday Night

    Sunday Night: Snow, freezing rain, and sleet before 1am, then rain and sleet between 1am and 4am, then snow and sleet likely after 4am. The snow could be heavy at times. Steady temperature around 32. Windy, with an east wind 25 to 34 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow and sleet accumulation of 1 to 3 inches possible.

    Low: 32 °F

    Wintry Mix
    and Windy

  • Monday

    Monday: Snow and sleet likely, becoming all snow after 7am. Cloudy, with a temperature falling to around 28 by 5pm. Breezy. Chance of precipitation is 60%. New snow and sleet accumulation of less than a half inch possible.

    High: 32 °F⇓

    Breezy.
    Snow/Sleet
    Likely then
    Snow Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16. Windy.

    Low: 16 °F

    Partly Cloudy
    and Windy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23. Windy.

    High: 23 °F

    Mostly Sunny
    and Windy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 16. Windy.

    Low: 16 °F

    Partly Cloudy
    and Windy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 12. Wind chill values between -5 and 5. Windy, with a northwest wind 24 to 32 mph.
Saturday
Mostly sunny and cold, with a high near 19. Wind chill values between -10 and zero. Blustery, with a northwest wind 17 to 24 mph.
Saturday Night
A 30 percent chance of snow, mainly after 4am. Cloudy, with a low around 16. Wind chill values between 5 and 10. North wind 11 to 14 mph.
Sunday
Snow, mainly after 7am. The snow could be heavy at times. High near 33. Wind chill values between 5 and 15. Windy, with a northeast wind 14 to 19 mph increasing to 25 to 30 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Sunday Night
Snow, freezing rain, and sleet before 1am, then rain and sleet between 1am and 4am, then snow and sleet likely after 4am. The snow could be heavy at times. Steady temperature around 32. Windy, with an east wind 25 to 34 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow and sleet accumulation of 1 to 3 inches possible.
Monday
Snow and sleet likely, becoming all snow after 7am. Cloudy, with a temperature falling to around 28 by 5pm. Breezy. Chance of precipitation is 60%. New snow and sleet accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 16. Windy.
Tuesday
Mostly sunny, with a high near 23. Windy.
Tuesday Night
Partly cloudy, with a low around 16. Windy.
Wednesday
Mostly sunny, with a high near 24. Breezy.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 23. Blustery.
Thursday Night
Partly cloudy, with a low around 14. Blustery.
Friday
Mostly sunny, with a high near 24. Blustery.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
12:58 pm EST Jan 23, 2026
Forecast Valid:
4pm EST Jan 23, 2026-6pm EST Jan 30, 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