National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

53°F

12°C

Humidity 66%
Wind Speed SW 9 mph
Barometer 29.88 in (1011.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 10 Nov 8:56 pm EST
Extended Forecast for

West Sayville NY

  • Tonight

    Tonight: Clear, with a low around 45. West wind 9 to 11 mph.

    Low: 45 °F

    Clear

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 60. Northwest wind 6 to 8 mph.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 4am. Increasing clouds, with a low around 46. Light and variable wind becoming southeast 5 to 8 mph after midnight.

    Low: 46 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain, mainly after 1pm. High near 60. East wind 11 to 14 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 44. Northeast wind 10 to 14 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 45. West wind 9 to 11 mph.
Veterans Day
Mostly sunny, with a high near 60. Northwest wind 6 to 8 mph.
Wednesday Night
A 20 percent chance of rain after 4am. Increasing clouds, with a low around 46. Light and variable wind becoming southeast 5 to 8 mph after midnight.
Thursday
Rain, mainly after 1pm. High near 60. East wind 11 to 14 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain likely. Mostly cloudy, with a low around 44. Northeast wind 10 to 14 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 37.
Saturday
A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 48.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
West Sayville NY
 40.74°N 73.1°W (Elev. 30 ft)
Last Update:
6:08 pm EST Nov 10, 2026
Forecast Valid:
9pm EST Nov 10, 2026-6pm EST Nov 17, 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