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Islip, New York Weather Forecast
Islip, New York Weather
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Weather Forecast for Islip, New York : Suffolk County
Issued: 7:54 pm EST Dec 20, 2025 Latitude: 40.7298207 Longitude: -73.2103934 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Mostly Cloudy on Tonight Mostly Sunny on Sunday Mostly Sunny on Monday 80% chance of rain & snow on Tuesday Sunny on Wednesday 40% chance of rain on Christmas Day 30% chance of rain on Friday Mostly Cloudy on Saturday
Low: 39°F High: 46°F High: 38°F High: 44°F High: 42°F High: 44°F High: 49°F High: 44°F
Low: 26°F Low: 30°F Low: 33°F Low: 30°F Low: 35°F Low: 33°F  
Mostly Cloudy Mostly Sunny Mostly Sunny Rain & Snow Sunny Rain Rain Mostly Cloudy
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Current Conditions at
ISLIP - (KISP)
39°
Feels like 31°F
Mostly Cloudy
as of 9:56 PM EST
Rel. Humidity: 64%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
13 MPH
190° South
Cloud Level(s): Few at 18000ft, Broken at 24000ft
Current Conditions at
FARMINGDALE - (KFRG)
37°
Feels like 28°F
Clear
as of 9:53 PM EST
Rel. Humidity: 69%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
14 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
SHIRLEY/BROOKHAVEN - (KHWV)
39°
Feels like 32°F
Clear
as of 9:56 PM EST
Rel. Humidity: 69%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
NEW YORK-KENNEDY - (KJFK)
37°
Feels like 27°F
Mostly Cloudy
as of 9:51 PM EST
Rel. Humidity: 69%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
17 MPH
200° South
Cloud Level(s): Scattered at 20000ft, Broken at 25000ft
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a steady temperature around 39. Southwest wind 9 to 11 mph, with gusts as high as 28 mph.

Mostly Sunny on Sunday Sunday... Cloudy, then gradually becoming mostly sunny, with a high near 46. Northwest wind 10 to 14 mph, with gusts as high as 28 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 26. Wind chill values between 15 and 20. Northwest wind around 11 mph, with gusts as high as 28 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 38. Wind chill values between 15 and 25. West wind around 10 mph, with gusts as high as 22 mph.

40% chance of snow Monday Night Monday Night... A chance of snow after 1am, mixing with rain after 4am. Mostly cloudy, with a low around 30. West wind around 6 mph. Chance of precipitation is 40%.

80% chance of rain & snow Tuesday Tuesday... Snow before 7am, then rain and snow between 7am and 8am, then rain after 8am. High near 44. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 33.

Sunny on Wednesday Wednesday... Sunny, with a high near 42.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 30.

40% chance of rain Christmas Day Christmas Day... A 40 percent chance of rain. Cloudy, with a high near 44.

30% chance of rain Thursday Night Thursday Night... A 30 percent chance of rain. Mostly cloudy, with a low around 35.

30% chance of rain Friday Friday... A 30 percent chance of rain. Partly sunny, with a high near 49.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 33.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 44.

Current Radar Image


Sun Almanac for Islip, New York
Sunrise: 07:13 AM
Sunset: 4:28 PM
Civil Sunrise:06:42 AM
Civil Sunset: 4:59 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 5:34 PM
Astro Sunrise: 05:34 AM
Astro Sunset: 6:07 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.