| National Weather Service Forecast for:
Islip NY Issued by: National Weather Service New York, NY |
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| Updated: 2:20 pm EDT Jul 16, 2026 | ||||||||||||||||||
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| This Afternoon |
A 20 percent chance of showers and thunderstorms after 5pm. Areas of smoke. Partly sunny, with a high near 83. Southwest wind 11 to 13 mph. |
| Tonight |
Widespread smoke, mainly after 8pm. Partly cloudy, with a low around 70. Northwest wind 5 to 7 mph. |
| Friday |
Areas of smoke before 2pm. Mostly sunny, with a high near 85. Light and variable wind becoming southwest 5 to 7 mph in the morning. |
| Friday Night |
Patchy smoke. Partly cloudy, with a low around 71. South wind 5 to 7 mph. |
| Saturday |
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 84. South wind 7 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible. |
| Saturday Night |
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 72. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible. |
| Sunday |
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 86. |
| Sunday Night |
Mostly clear, with a low around 66. |
| Monday |
Sunny, with a high near 80. |
| Monday Night |
Partly cloudy, with a low around 69. |
| Tuesday |
A 40 percent chance of showers. Partly sunny, with a high near 82. |
| Tuesday Night |
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%. |
| Wednesday |
A 40 percent chance of showers. Partly sunny, with a high near 83. |
| Wednesday Night |
A 40 percent chance of showers. Mostly cloudy, with a low around 67. |
| Thursday |
Mostly sunny, with a high near 81. |
Forecast from NOAA-NWS for Islip NY.
