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

28°F

-2°C

Humidity 49%
Wind Speed N 10 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 5 Feb 12:56 pm EST
Extended Forecast for

5 Miles SSE West Sayville NY

Extreme Cold Watch February 7, 06:00pm until February 8, 01:00pm
Click here for hazard details and duration
Extreme Cold Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 28. Wind chill values between 20 and 25. North wind around 9 mph.

    High: 28 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 22. Wind chill values between 10 and 15. Northeast wind 6 to 10 mph.

    Low: 22 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 29. Wind chill values between 10 and 20. North wind 5 to 10 mph becoming light and variable in the afternoon.

    High: 29 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Snow, mainly after 1am. Steady temperature around 27. Wind chill values between 15 and 20. Light west wind increasing to 5 to 10 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 27 °F

    Chance Snow
    then Snow

  • Saturday

    Saturday: Snow, mainly before 1pm. Temperature falling to around 18 by 5pm. Windy, with a northwest wind 14 to 24 mph increasing to 28 to 38 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 26 °F⇓

    Snow and
    Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Very windy.

    Low: 8 °F

    Decreasing
    Clouds and
    Very Windy

  • Sunday

    Sunday: Sunny and cold, with a high near 19. Windy.

    High: 19 °F

    Cold and
    Windy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 12. Blustery.

    Low: 12 °F

    Mostly Clear
    and Blustery

  • Monday

    Monday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 28. Wind chill values between 20 and 25. North wind around 9 mph.
Tonight
Increasing clouds, with a low around 22. Wind chill values between 10 and 15. Northeast wind 6 to 10 mph.
Friday
Mostly cloudy, with a high near 29. Wind chill values between 10 and 20. North wind 5 to 10 mph becoming light and variable in the afternoon.
Friday Night
Snow, mainly after 1am. Steady temperature around 27. Wind chill values between 15 and 20. Light west wind increasing to 5 to 10 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow, mainly before 1pm. Temperature falling to around 18 by 5pm. Windy, with a northwest wind 14 to 24 mph increasing to 28 to 38 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Very windy.
Sunday
Sunny and cold, with a high near 19. Windy.
Sunday Night
Mostly clear, with a low around 12. Blustery.
Monday
Mostly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 29.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE West Sayville NY
 40.67°N 73.06°W (Elev. 0 ft)
Last Update:
1:09 pm EST Feb 5, 2026
Forecast Valid:
2pm EST Feb 5, 2026-6pm EST Feb 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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