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.

Fog/Mist

47°F

8°C

Humidity 90%
Wind Speed NE 14 G 24 mph
Barometer 29.43 in (996.6 mb)
Dewpoint 44°F (7°C)
Visibility 6.00 mi
Wind Chill41°F (5°C)
Last update 13 Nov 3:56 am EST
Extended Forecast for

Sayville NY

Coastal Flood Advisory November 13, 09:00am until November 13, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory

  • Overnight

    Overnight: Rain. Low around 42. Northeast wind around 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.

    Low: 42 °F

    Rain

  • Friday

    Friday: Rain, mainly before 4pm. High near 48. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: A 30 percent chance of rain before 10pm. Cloudy, with a low around 38. North wind around 11 mph.

    Low: 38 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 47. Northwest wind 10 to 14 mph.

    High: 47 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37. Northwest wind around 11 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain. Low around 42. Northeast wind around 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.
Friday
Rain, mainly before 4pm. High near 48. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 30 percent chance of rain before 10pm. Cloudy, with a low around 38. North wind around 11 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 47. Northwest wind 10 to 14 mph.
Saturday Night
Partly cloudy, with a low around 37. Northwest wind around 11 mph.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 57.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Sunny, with a high near 58.
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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:
1:45 am EST Nov 13, 2026
Forecast Valid:
4am EST Nov 13, 2026-6pm EST Nov 19, 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