| National Weather Service Forecast for:
Islip NY Issued by: National Weather Service New York, NY |
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| Updated: 2:01 am EST Dec 5, 2025 | ||||||||||||||||||
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| Overnight |
Mostly cloudy, with a low around 18. Wind chill values between 10 and 15. North wind 9 to 11 mph. |
| Friday |
Increasing clouds, with a high near 35. Wind chill values between 10 and 20. Light and variable wind becoming east around 6 mph in the morning. |
| Friday Night |
A chance of snow after 10pm, mixing with freezing rain after 1am. Cloudy, with a low around 29. Calm wind. Chance of precipitation is 30%. |
| Saturday |
A slight chance of rain and snow before 8am, then a slight chance of rain between 8am and 10am. Mostly cloudy, with a high near 43. Calm wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 20%. |
| Saturday Night |
Partly cloudy, with a low around 29. West wind around 6 mph. |
| Sunday |
Increasing clouds, with a high near 41. |
| Sunday Night |
Mostly cloudy, with a low around 25. |
| Monday |
Mostly sunny, with a high near 36. |
| Monday Night |
Mostly clear, with a low around 18. |
| Tuesday |
Partly sunny, with a high near 40. |
| Tuesday Night |
Mostly cloudy, with a low around 31. |
| Wednesday |
A 30 percent chance of rain. Mostly cloudy, with a high near 50. |
| Wednesday Night |
Rain likely. Cloudy, with a low around 37. Chance of precipitation is 60%. |
| Thursday |
A 40 percent chance of rain. Mostly cloudy, with a high near 46. |
Forecast from NOAA-NWS for Islip NY.
