Hewlett Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hewlett Harbor, a village in Nassau County, New York.
This Afternoon
82°F
Mostly Sunny
Mostly sunny. High near 82, with temperatures falling to around 80 in the afternoon. Northwest wind around 12 mph.
7-day forecast for Hewlett Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Mostly Sunny | 12 mph NW | 0% |
| Tonight | 59°F | Partly Cloudy | 12 mph N | 0% |
| Saturday | 72°F | Partly Sunny | 10 mph E | 0% |
| Saturday Night | 62°F | Mostly Cloudy | 8 mph SE | 6% |
| Sunday | 73°F | Rain Showers | 8 to 14 mph SE | 75% |
| Sunday Night | 62°F | Showers And Thunderstorms | 8 to 13 mph W | 89% |
| Monday | 71°F | Chance Rain Showers | 12 to 15 mph NE | 53% |
| Monday Night | 59°F | Chance Rain Showers | 12 to 16 mph NE | 51% |
| Tuesday | 67°F | Chance Rain Showers | 16 to 20 mph NE | 51% |
| Tuesday Night | 57°F | Chance Rain Showers | 18 mph NE | 43% |
| Wednesday | 68°F | Chance Rain Showers | 17 to 21 mph NE | 33% |
| Wednesday Night | 57°F | Chance Rain Showers | 17 to 21 mph NE | 35% |
| Thursday | 68°F | Chance Rain Showers | 16 to 20 mph NE | 35% |
| Thursday Night | 57°F | Chance Rain Showers | 12 to 15 mph NE | 35% |
Forecast source: National Weather Service (api.weather.gov) for Hewlett Harbor (40.634, -73.686). Updated through the day.
Growing snapshot for Hewlett Harbor
Last spring frost
Apr 7
First fall frost
Nov 8
Growing season
212 days
Hardiness zone
7b
More local growing data for Hewlett Harbor: nearby ZIP 11557 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Oceanside, Ny (3.5 mi from Hewlett Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.