Harbor Isle, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harbor Isle, a community in Nassau County, New York.
Overnight
55°F
Patchy Fog
Patchy fog. Mostly clear, with a low around 55. Southwest wind around 6 mph.
7-day forecast for Harbor Isle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Patchy Fog | 6 mph SW | 3% |
| Wednesday | 69°F | Patchy Fog then Sunny | 3 to 12 mph SW | 3% |
| Wednesday Night | 59°F | Partly Cloudy | 7 to 12 mph S | 2% |
| Thursday | 68°F | Slight Chance Rain Showers | 7 to 13 mph S | 24% |
| Thursday Night | 60°F | Rain Showers | 6 to 12 mph SW | 85% |
| Friday | 67°F | Showers And Thunderstorms | 5 to 8 mph SW | 91% |
| Friday Night | 56°F | Showers And Thunderstorms | 7 mph W | 91% |
| Saturday | 64°F | Rain Showers Likely | 8 to 12 mph NW | 55% |
| Saturday Night | 48°F | Slight Chance Rain Showers | 13 mph NW | 16% |
| Sunday | 60°F | Slight Chance Rain Showers then Mostly Sunny | 10 mph W | 15% |
| Sunday Night | 47°F | Partly Cloudy | 10 to 14 mph W | 14% |
| Monday | 60°F | Chance Light Rain | 14 to 17 mph NW | 26% |
| Monday Night | 46°F | Chance Light Rain | 15 mph W | 26% |
| Tuesday | 61°F | Slight Chance Light Rain then Mostly Sunny | 17 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Harbor Isle (40.603, -73.665). Updated through the day.
Growing snapshot for Harbor Isle
Last spring frost
Apr 7
First fall frost
Nov 8
Growing season
212 days
Hardiness zone
7b
More local growing data for Harbor Isle: nearby ZIP 11558 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Oceanside, Ny (2.2 mi from Harbor Isle). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.