Water Mill, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Water Mill, a community in Suffolk County, New York.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North wind 2 to 9 mph.
7-day forecast for Water Mill
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 2 to 9 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 8 to 12 mph E | 0% |
| Saturday Night | 55°F | Partly Cloudy | 6 mph E | 1% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 73% |
| Sunday Night | 58°F | Showers And Thunderstorms | 6 to 12 mph SE | 91% |
| Monday | 68°F | Rain Showers Likely | 15 mph NE | 71% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 16 mph NE | 28% |
| Tuesday | 65°F | Chance Rain Showers | 20 mph NE | 25% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 17 to 21 mph NE | 24% |
| Wednesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 20 to 23 mph NE | 16% |
| Wednesday Night | 54°F | Chance Rain Showers | 20 to 23 mph NE | 30% |
| Thursday | 65°F | Chance Rain Showers | 23 mph NE | 35% |
| Thursday Night | 54°F | Chance Rain Showers | 15 to 20 mph NE | 37% |
| Friday | 67°F | Chance Rain Showers | 15 to 18 mph N | 34% |
Forecast source: National Weather Service (api.weather.gov) for Water Mill (40.922, -72.351). Updated through the day.
Growing snapshot for Water Mill
Last spring frost
Apr 23
First fall frost
Oct 24
Growing season
182 days
Hardiness zone
7b
More local growing data for Water Mill: nearby ZIP 11976 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Bridgehampton, Ny (3 mi from Water Mill). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.