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

32°F

0°C

Humidity 33%
Wind Speed W 12 mph
Barometer 30.17 in (1021.6 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 23 Jan 8:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

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

  • Today

    Today: Mostly sunny, with a high near 34. Wind chill values between 20 and 25. Windy, with a west wind 20 to 26 mph.

    High: 34 °F

    Mostly Sunny
    and Windy

  • Tonight

    Tonight: Partly cloudy, with a low around 12. Wind chill values between -5 and 5. Windy, with a northwest wind 22 to 28 mph.

    Low: 12 °F

    Partly Cloudy
    and Windy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 18. Wind chill values between -5 and 5. Blustery, with a northwest wind 14 to 20 mph.

    High: 18 °F

    Mostly Sunny
    and Blustery
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after 1am. Cloudy, with a low around 16. Wind chill values between zero and 5. North wind around 14 mph.

    Low: 16 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 31. Windy, with a northeast wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    High: 31 °F

    Heavy Snow
    and Windy

  • Sunday Night

    Sunday Night: Snow and sleet before 1am, then freezing rain and sleet between 1am and 4am, then snow and sleet after 4am. Steady temperature around 30. Windy. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow and sleet accumulation of 2 to 4 inches possible.

    Low: 30 °F

    Wintry Mix
    and Windy

  • Monday

    Monday: Snow, mainly before 1pm. High near 31. Blustery. Chance of precipitation is 80%.

    High: 31 °F

    Snow and
    Blustery

  • Monday Night

    Monday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 16. Windy.

    Low: 16 °F

    Chance Snow
    and Windy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24. Blustery.

    High: 24 °F

    Mostly Sunny
    and Blustery

Detailed Forecast

Today
Mostly sunny, with a high near 34. Wind chill values between 20 and 25. Windy, with a west wind 20 to 26 mph.
Tonight
Partly cloudy, with a low around 12. Wind chill values between -5 and 5. Windy, with a northwest wind 22 to 28 mph.
Saturday
Mostly sunny and cold, with a high near 18. Wind chill values between -5 and 5. Blustery, with a northwest wind 14 to 20 mph.
Saturday Night
A 40 percent chance of snow after 1am. Cloudy, with a low around 16. Wind chill values between zero and 5. North wind around 14 mph.
Sunday
Snow. The snow could be heavy at times. High near 31. Windy, with a northeast wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Sunday Night
Snow and sleet before 1am, then freezing rain and sleet between 1am and 4am, then snow and sleet after 4am. Steady temperature around 30. Windy. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow and sleet accumulation of 2 to 4 inches possible.
Monday
Snow, mainly before 1pm. High near 31. Blustery. Chance of precipitation is 80%.
Monday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 16. Windy.
Tuesday
Mostly sunny, with a high near 24. Blustery.
Tuesday Night
Partly cloudy, with a low around 16. Windy.
Wednesday
Mostly sunny, with a high near 25.
Wednesday Night
Mostly cloudy, with a low around 17.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 24. Blustery.
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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:
2:28 am EST Jan 23, 2026
Forecast Valid:
9am EST Jan 23, 2026-6pm EST Jan 29, 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