Syosset, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Syosset, a community in Nassau County, New York.
Overnight
53°F
Patchy Fog
Patchy fog. Mostly clear, with a low around 53. Southwest wind around 5 mph.
7-day forecast for Syosset
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Patchy Fog | 5 mph SW | 3% |
| Wednesday | 72°F | Patchy Fog then Sunny | 5 to 12 mph SW | 3% |
| Wednesday Night | 59°F | Partly Cloudy | 9 mph S | 2% |
| Thursday | 71°F | Chance Rain Showers | 8 to 12 mph S | 26% |
| Thursday Night | 61°F | Rain Showers | 7 to 10 mph S | 83% |
| Friday | 68°F | Showers And Thunderstorms | 7 mph SW | 90% |
| Friday Night | 56°F | Showers And Thunderstorms | 7 mph W | 90% |
| Saturday | 65°F | Rain Showers Likely | 9 mph NW | 56% |
| Saturday Night | 45°F | Slight Chance Rain Showers | 10 mph NW | 18% |
| Sunday | 60°F | Slight Chance Rain Showers then Mostly Sunny | 9 mph W | 17% |
| Sunday Night | 43°F | Partly Cloudy | 9 mph W | 14% |
| Monday | 59°F | Chance Light Rain | 10 to 15 mph NW | 25% |
| Monday Night | 41°F | Chance Light Rain | 13 mph W | 25% |
| Tuesday | 60°F | Slight Chance Light Rain then Mostly Sunny | 15 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Syosset (40.816, -73.502). Updated through the day.
Growing snapshot for Syosset
Last spring frost
Apr 9
First fall frost
Nov 10
Growing season
215 days
Hardiness zone
7b
More local growing data for Syosset: nearby ZIP 11791 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Centerport, Ny (7.8 mi from Syosset). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.