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.
Today
67°F
Mostly Sunny
Mostly sunny. High near 67, with temperatures falling to around 61 in the afternoon. South wind 8 to 12 mph.
7-day forecast for Hewlett Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Mostly Sunny | 8 to 12 mph S | 0% |
| Tonight | 53°F | Mostly Clear | 3 to 10 mph SW | 0% |
| Wednesday | 70°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Wednesday Night | 57°F | Mostly Cloudy | 8 mph S | 0% |
| Thursday | 70°F | Slight Chance Rain Showers | 6 to 12 mph S | 24% |
| Thursday Night | 60°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 67% |
| Friday | 69°F | Showers And Thunderstorms | 5 to 8 mph S | 79% |
| Friday Night | 56°F | Showers And Thunderstorms then Light Rain | 7 mph W | 79% |
| Saturday | 66°F | Light Rain Likely | 8 mph NW | 59% |
| Saturday Night | 49°F | Chance Light Rain then Partly Cloudy | 7 mph NW | 26% |
| Sunday | 62°F | Mostly Sunny | 8 mph NW | 13% |
| Sunday Night | 48°F | Partly Cloudy then Slight Chance Light Rain | 7 mph W | 19% |
| Monday | 61°F | Chance Light Rain | 7 to 14 mph NW | 32% |
| Monday Night | 46°F | Chance Light Rain | 13 mph NW | 32% |
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 Nov 3, 2026.