Head of the Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Head of the Harbor, a village in Suffolk County, New York.
Today
70°F
Partly Sunny
Partly sunny. High near 70, with temperatures falling to around 67 in the afternoon. East wind around 10 mph.
7-day forecast for Head of the Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Partly Sunny | 10 mph E | 0% |
| Tonight | 55°F | Partly Cloudy | 8 mph SE | 2% |
| Sunday | 70°F | Rain | 7 to 12 mph SE | 85% |
| Sunday Night | 56°F | Rain | 7 to 13 mph SE | 85% |
| Monday | 68°F | Chance Light Rain then Mostly Cloudy | 9 to 15 mph NE | 41% |
| Monday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 14 mph NE | 21% |
| Tuesday | 64°F | Chance Rain Showers | 16 mph NE | 25% |
| Tuesday Night | 53°F | Chance Rain Showers | 15 to 18 mph NE | 25% |
| Wednesday | 65°F | Slight Chance Rain Showers | 21 mph NE | 19% |
| Wednesday Night | 53°F | Chance Rain Showers | 21 mph NE | 34% |
| Thursday | 64°F | Chance Rain Showers | 22 mph NE | 34% |
| Thursday Night | 52°F | Chance Rain Showers | 17 to 21 mph NE | 40% |
| Friday | 65°F | Chance Rain Showers | 20 mph N | 37% |
| Friday Night | 53°F | Chance Rain Showers | 18 to 22 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Head of the Harbor (40.898, -73.162). Updated through the day.
Growing snapshot for Head of the Harbor
Last spring frost
Apr 15
First fall frost
Nov 10
Growing season
208 days
Hardiness zone
7b
More local growing data for Head of the Harbor: nearby ZIP 11780 weather · frost dates · planting calendar · New York frost dates
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Center Moriches
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Dering Harbor
Climate data from the nearest NOAA station, Setauket Strong, Ny (4.8 mi from Head of the Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.