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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: 1:17 am EST Dec 18, 2025 Latitude: 40.7298207 Longitude: -73.2103934 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Cloudy on Overnight Sunny on Thursday 100% chance of thunderstorms on Friday Increasing Clouds on Saturday Mostly Sunny on Sunday Sunny on Monday 50% chance of rain & snow on Tuesday Mostly Sunny on Wednesday
Low: 28°F High: 53°F High: 56 °F High: 44°F High: 47°F High: 35°F High: 41°F High: 44°F
Low: 52 °F Low: 27°F Low: 35°F Low: 24°F Low: 25°F Low: 33°F  
Cloudy Sunny Thunderstorms Increasing Clouds Mostly Sunny Sunny Rain & Snow Mostly Sunny
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Current Conditions at
ISLIP - (KISP)
30°
Clear
as of 1:56 AM EST
Rel. Humidity: 80%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
FARMINGDALE - (KFRG)
30°
Clear
as of 1:53 AM EST
Rel. Humidity: 80%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: VFR
Wind Data
6 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
SHIRLEY/BROOKHAVEN - (KHWV)
28°
Clear
as of 1:56 AM EST
Rel. Humidity: 92%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
5 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
NEW YORK-KENNEDY - (KJFK)
34°
Mostly Cloudy
as of 1:51 AM EST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
6 MPH
250° West
Cloud Level(s): Broken at 25000ft
Cloudy on Overnight Overnight... Partly cloudy, with a low around 28. Calm wind.
Sunny on Thursday Thursday... Sunny, with a high near 53. Light and variable wind becoming south 5 to 10 mph in the morning.
90% chance of rain Thursday Night Thursday Night... Showers, mainly after 1am. Temperature rising to around 52 by 4am. Breezy, with a south wind 7 to 12 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 tenth and quarter of an inch possible.
100% chance of thunderstorms Friday Friday... Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a slight chance of showers after 1pm. Temperature rising to near 56 by 10am, then falling to around 44 during the remainder of the day. Windy, with a south wind 20 to 30 mph becoming west in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 100%. New rainfall 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 14 to 22 mph, with gusts 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 35.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 47.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 24.
Sunny on Monday Monday... Sunny, with a high near 35.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 25.
50% chance of rain & snow Tuesday Tuesday... A chance of rain and snow. Mostly cloudy, with a high near 41. Chance of precipitation is 50%.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 33.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 44.
Current Radar Image


Sun Almanac for Islip, New York
Sunrise: 07:12 AM
Sunset: 4:27 PM
Civil Sunrise:06:41 AM
Civil Sunset: 4:58 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 5:33 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.