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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: 7:25 pm EST Dec 17, 2025 Latitude: 40.7298207 Longitude: -73.2103934 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Cloudy on Tonight Mostly Sunny on Thursday 90% chance of thunderstorms on Friday Increasing Clouds on Saturday Mostly Sunny on Sunday Sunny on Monday 40% chance of rain & snow on Tuesday Mostly Sunny on Wednesday
Low: 28°F High: 53°F High: 55 °F High: 44°F High: 47°F High: 36°F High: 43°F High: 42°F
Low: 51 °F Low: 27°F Low: 34°F Low: 25°F Low: 26°F Low: 32°F  
Cloudy Mostly Sunny Thunderstorms Increasing Clouds Mostly Sunny Sunny Rain & Snow Mostly Sunny
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Current Conditions at
ISLIP - (KISP)
45°
Feels like 39°F
Mostly Cloudy
as of 6:56 PM EST
Rel. Humidity: 56%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 22 MPH
260° West
Cloud Level(s): Broken at 25000ft
Current Conditions at
FARMINGDALE - (KFRG)
41°
Clear
as of 6:53 PM EST
Rel. Humidity: 65%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
7 MPH
250° West
Cloud Level(s): Clear
Current Conditions at
SHIRLEY/BROOKHAVEN - (KHWV)
41°
Clear
as of 6:56 PM EST
Rel. Humidity: 65%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
6 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
NEW YORK-KENNEDY - (KJFK)
41°
Feels like 33°F
Mostly Cloudy
as of 6:51 PM EST
Rel. Humidity: 70%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
13 MPH
260° West
Cloud Level(s): Broken at 25000ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 28. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 53. Light east wind becoming south 5 to 10 mph in the morning.
90% chance of rain Thursday Night Thursday Night... Rain, mainly after 1am. Temperature rising to around 51 by 3am. Breezy, with a south wind 8 to 13 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
90% chance of thunderstorms Friday Friday... Rain and possibly a thunderstorm. Temperature rising to near 55 by 10am, then falling to around 42 during the remainder of the day. Windy, with a south wind 23 to 28 mph becoming west 17 to 22 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 27. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 44 mph.
Increasing Clouds on Saturday Saturday... Increasing clouds, with a high near 44.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 34.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 47.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 25.
Sunny on Monday Monday... Sunny, with a high near 36.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 26.
40% chance of rain & snow Tuesday Tuesday... A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 40%.
30% chance of rain Tuesday Night Tuesday Night... A 30 percent chance of rain. Mostly cloudy, with a low around 32.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 42.
Current Radar Image


Sun Almanac for Islip, New York
Sunrise: 07:11 AM
Sunset: 4:27 PM
Civil Sunrise:06:40 AM
Civil Sunset: 4:58 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 5:32 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:06 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.