Sag Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sag Harbor, a village in Suffolk County, New York.
This Afternoon
77°F
Sunny
Sunny, with a high near 77. North wind around 7 mph.
7-day forecast for Sag Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 7 mph N | 0% |
| Tonight | 57°F | Partly Cloudy | 3 to 10 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 9 mph NE | 0% |
| Saturday Night | 56°F | Partly Cloudy | 6 mph E | 1% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 3 to 9 mph SE | 74% |
| Sunday Night | 60°F | Showers And Thunderstorms | 6 to 10 mph SE | 91% |
| Monday | 67°F | Rain Showers Likely | 10 to 14 mph NE | 71% |
| Monday Night | 55°F | Chance Rain Showers | 9 to 15 mph NE | 28% |
| Tuesday | 65°F | Chance Rain Showers | 17 mph NE | 25% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 15 to 20 mph NE | 22% |
| Wednesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 17 to 21 mph NE | 15% |
| Wednesday Night | 55°F | Chance Rain Showers | 17 to 21 mph NE | 29% |
| Thursday | 65°F | Chance Rain Showers | 21 mph NE | 35% |
| Thursday Night | 55°F | Chance Rain Showers | 14 to 17 mph NE | 37% |
Forecast source: National Weather Service (api.weather.gov) for Sag Harbor (40.994, -72.289). Updated through the day.
Growing snapshot for Sag Harbor
Last spring frost
Apr 23
First fall frost
Oct 24
Growing season
182 days
Hardiness zone
7a
More local growing data for Sag Harbor: nearby ZIP 11963 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Bridgehampton, Ny (3.6 mi from Sag Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.