Roslyn Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roslyn Harbor, a village in Nassau County, New York.
Today
71°F
Partly Sunny
Partly sunny, with a high near 71. East wind 7 to 12 mph.
7-day forecast for Roslyn Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Partly Sunny | 7 to 12 mph E | 0% |
| Tonight | 58°F | Mostly Cloudy | 7 mph SE | 3% |
| Sunday | 71°F | Rain | 7 to 10 mph SE | 86% |
| Sunday Night | 58°F | Rain | 7 to 12 mph SE | 86% |
| Monday | 69°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph NE | 40% |
| Monday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 14 mph NE | 21% |
| Tuesday | 65°F | Chance Rain Showers | 16 mph NE | 26% |
| Tuesday Night | 53°F | Chance Rain Showers | 17 mph NE | 25% |
| Wednesday | 66°F | Slight Chance Rain Showers | 17 to 21 mph NE | 22% |
| Wednesday Night | 53°F | Chance Rain Showers | 18 to 22 mph NE | 32% |
| Thursday | 65°F | Chance Rain Showers | 18 to 23 mph NE | 32% |
| Thursday Night | 52°F | Chance Rain Showers | 17 to 22 mph NE | 39% |
| Friday | 66°F | Chance Rain Showers | 16 to 21 mph N | 39% |
| Friday Night | 53°F | Chance Rain Showers | 17 to 21 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Roslyn Harbor (40.811, -73.641). Updated through the day.
Growing snapshot for Roslyn Harbor
Last spring frost
Apr 2
First fall frost
Nov 12
Growing season
224 days
Hardiness zone
7b
More local growing data for Roslyn Harbor: nearby ZIP 11576 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Mineola, Ny (4.7 mi from Roslyn Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.