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.

Overcast

34°F

1°C

Humidity 92%
Wind Speed NW 6 mph
Barometer 29.72 in (1006.3 mb)
Dewpoint 32°F (0°C)
Visibility 8.00 mi
Wind Chill29°F (-2°C)
Last update 21 Feb 12:56 am EST
Extended Forecast for

Sayville NY

Winter Storm Watch February 22, 06:00am until February 23, 06:00pm
Coastal Flood Watch February 22, 10:00pm until February 23, 04:00am
Click here for hazard details and duration
Winter Storm Watch
Coastal Flood Watch

  • Overnight

    Overnight: A slight chance of rain and snow before 3am, then a slight chance of snow. Mostly cloudy, with a low around 31. West wind around 6 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 44. West wind around 7 mph becoming north in the afternoon.

    High: 44 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of rain and snow before 1am, then a chance of rain between 1am and 4am, then a chance of rain and snow after 4am. Mostly cloudy, with a low around 30. East wind 3 to 7 mph. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: Snow likely, mainly after 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. East wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Chance Snow
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Areas of blowing snow. Low around 28. Windy, with a north wind 21 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    Low: 28 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Monday

    Monday: Snow, mainly before 1pm. Areas of blowing snow before 1pm. High near 35. Windy. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    High: 35 °F

    Snow and
    Areas Blowing
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of rain and snow before 3am, then a slight chance of snow. Mostly cloudy, with a low around 31. West wind around 6 mph. Chance of precipitation is 20%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 44. West wind around 7 mph becoming north in the afternoon.
Saturday Night
A chance of rain and snow before 1am, then a chance of rain between 1am and 4am, then a chance of rain and snow after 4am. Mostly cloudy, with a low around 30. East wind 3 to 7 mph. Chance of precipitation is 40%.
Sunday
Snow likely, mainly after 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. East wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Areas of blowing snow. Low around 28. Windy, with a north wind 21 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.
Monday
Snow, mainly before 1pm. Areas of blowing snow before 1pm. High near 35. Windy. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 40.
Wednesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 32.
Thursday
Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Friday
Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sayville NY
 40.73°N 73.07°W (Elev. 16 ft)
Last Update:
5:24 pm EST Feb 20, 2026
Forecast Valid:
1am EST Feb 21, 2026-6pm EST Feb 27, 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