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.

Fair

4°F

-16°C

Humidity 73%
Wind Speed SW 7 mph
Barometer 30.15 in (1021.1 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Wind Chill-8°F (-22°C)
Last update 31 Jan 2:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

Cold Weather Advisory January 31, 03:31am until February 1, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 31, 03:31am until February 1, 10:00am

    NOW until 10:00am Sun

    Cold Weather Advisory

  • Overnight

    Low: 9 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 22. Wind chill values between -5 and 5. North wind 9 to 11 mph.

    High: 22 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 17. Wind chill values between zero and 10. Windy, with a north wind 14 to 19 mph increasing to 23 to 28 mph after midnight.

    Low: 17 °F

    Mostly Cloudy
    and Blustery
    then Slight
    Chance Snow
    and Windy

  • Sunday

    Sunday: A 20 percent chance of snow before 1pm. Mostly cloudy, with a high near 25. Wind chill values between -5 and 5. Windy, with a north wind 28 to 33 mph, with gusts as high as 44 mph.

    High: 25 °F

    Slight Chance
    Snow and
    Windy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18. Windy, with a northwest wind 22 to 29 mph.

    Low: 18 °F

    Mostly Cloudy
    and Windy

  • Monday

    Monday: Mostly sunny, with a high near 30. Blustery.

    High: 30 °F

    Mostly Sunny
    and Blustery
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31.

    High: 31 °F

    Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 9. Wind chill values between -5 and zero. Northwest wind around 10 mph.
Saturday
Partly sunny, with a high near 22. Wind chill values between -5 and 5. North wind 9 to 11 mph.
Saturday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 17. Wind chill values between zero and 10. Windy, with a north wind 14 to 19 mph increasing to 23 to 28 mph after midnight.
Sunday
A 20 percent chance of snow before 1pm. Mostly cloudy, with a high near 25. Wind chill values between -5 and 5. Windy, with a north wind 28 to 33 mph, with gusts as high as 44 mph.
Sunday Night
Mostly cloudy, with a low around 18. Windy, with a northwest wind 22 to 29 mph.
Monday
Mostly sunny, with a high near 30. Blustery.
Monday Night
Mostly clear, with a low around 21.
Tuesday
Sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 30.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 31.
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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:
2:07 am EST Jan 31, 2026
Forecast Valid:
3am EST Jan 31, 2026-6pm EST Feb 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation