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.
This Afternoon
81°F
Sunny
Sunny. High near 81, with temperatures falling to around 79 in the afternoon. North wind around 10 mph.
7-day forecast for Old Westbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Sunny | 10 mph N | 0% |
| Tonight | 58°F | Partly Cloudy | 7 to 12 mph N | 0% |
| Saturday | 71°F | Mostly Sunny | 8 to 12 mph E | 0% |
| Saturday Night | 59°F | Mostly Cloudy | 5 to 8 mph SE | 9% |
| Sunday | 72°F | Showers And Thunderstorms | 8 to 14 mph S | 80% |
| Sunday Night | 61°F | Showers And Thunderstorms | 7 to 14 mph W | 89% |
| Monday | 69°F | Chance Rain Showers | 12 to 15 mph NE | 52% |
| Monday Night | 57°F | Chance Rain Showers | 12 to 15 mph NE | 29% |
| Tuesday | 65°F | Chance Rain Showers | 17 mph NE | 28% |
| Tuesday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 18 mph NE | 28% |
| Wednesday | 65°F | Slight Chance Rain Showers | 20 mph NE | 17% |
| Wednesday Night | 55°F | Chance Rain Showers | 17 to 21 mph NE | 36% |
| Thursday | 64°F | Chance Rain Showers | 17 to 21 mph NE | 36% |
| Thursday Night | 54°F | Chance Rain Showers | 15 to 20 mph NE | 36% |
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 Sep 19, 2026.