Islip, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Islip, a community in Suffolk County, New York.
Today
82°F
Mostly Sunny
Mostly sunny. High near 82, with temperatures falling to around 80 in the afternoon. East wind 3 to 7 mph.
7-day forecast for Islip
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny | 3 to 7 mph E | 0% |
| Tonight | 66°F | Mostly Cloudy | 2 to 6 mph E | 7% |
| Wednesday | 82°F | Partly Sunny then Slight Chance Rain Showers | 2 to 8 mph SE | 17% |
| Wednesday Night | 72°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph S | 22% |
| Thursday | 85°F | Mostly Sunny | 5 to 13 mph SW | 11% |
| Thursday Night | 74°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 to 13 mph SW | 19% |
| Friday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 17% |
| Friday Night | 73°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 32% |
| Saturday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Saturday Night | 72°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 9 mph SW | 28% |
| Sunday | 86°F | Mostly Sunny | 5 to 9 mph SW | 13% |
| Sunday Night | 73°F | Mostly Clear | 5 to 9 mph SW | 10% |
| Monday | 88°F | Sunny | 5 to 12 mph SW | 9% |
| Monday Night | 72°F | Slight Chance Rain Showers | 6 to 12 mph W | 19% |
Forecast source: National Weather Service (api.weather.gov) for Islip (40.730, -73.216). Updated through the day.
Growing snapshot for Islip
Last spring frost
Apr 4
First fall frost
Nov 11
Growing season
219 days
Hardiness zone
7b
More local growing data for Islip: nearby ZIP 11751 weather · frost dates · planting calendar · New York frost dates
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Center Moriches
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Central Islip
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Climate data from the nearest NOAA station, Molloy Cercom, Ny (6.5 mi from Islip). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.