Old Westbury, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Old Westbury, a village in Nassau County, New York.
Today
73°F
Sunny
Sunny. High near 73, with temperatures falling to around 66 in the afternoon. South wind 5 to 12 mph.
7-day forecast for Old Westbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 5 to 12 mph S | 0% |
| Tonight | 59°F | Partly Cloudy | 8 mph S | 0% |
| Thursday | 71°F | Mostly Cloudy | 8 to 12 mph S | 8% |
| Thursday Night | 61°F | Showers And Thunderstorms Likely | 6 to 12 mph S | 72% |
| Friday | 69°F | Showers And Thunderstorms | 6 mph S | 92% |
| Friday Night | 55°F | Showers And Thunderstorms | 6 mph W | 76% |
| Saturday | 65°F | Mostly Sunny | 9 mph W | 14% |
| Saturday Night | 46°F | Slight Chance Light Rain | 10 mph W | 22% |
| Sunday | 60°F | Slight Chance Light Rain then Mostly Sunny | 12 mph NW | 15% |
| Sunday Night | 44°F | Partly Cloudy | 10 mph W | 5% |
| Monday | 58°F | Sunny | 12 to 15 mph W | 11% |
| Monday Night | 42°F | Mostly Clear | 12 mph W | 11% |
| Tuesday | 61°F | Sunny | 14 mph SW | 4% |
| Tuesday Night | 43°F | Mostly Clear | 12 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Old Westbury (40.787, -73.598). Updated through the day.
Growing snapshot for Old Westbury
Last spring frost
Apr 2
First fall frost
Nov 12
Growing season
224 days
Hardiness zone
7b
More local growing data for Old Westbury: nearby ZIP 11568 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Mineola, Ny (3.9 mi from Old Westbury). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.