Stony Brook, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stony Brook, a community in Suffolk County, New York.
Overnight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. Northeast wind around 13 mph.
7-day forecast for Stony Brook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Partly Cloudy | 13 mph NE | 0% |
| Saturday | 68°F | Mostly Sunny | 8 to 13 mph E | 0% |
| Saturday Night | 56°F | Partly Cloudy | 8 mph SE | 3% |
| Sunday | 70°F | Showers And Thunderstorms | 7 to 14 mph SE | 82% |
| Sunday Night | 59°F | Showers And Thunderstorms | 7 to 13 mph SW | 90% |
| Monday | 68°F | Rain Showers Likely | 12 to 15 mph NE | 59% |
| Monday Night | 54°F | Chance Rain Showers | 12 to 17 mph NE | 26% |
| Tuesday | 65°F | Chance Rain Showers | 18 mph NE | 26% |
| Tuesday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 20 mph NE | 26% |
| Wednesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 21 mph NE | 15% |
| Wednesday Night | 54°F | Chance Rain Showers | 21 mph NE | 35% |
| Thursday | 64°F | Chance Rain Showers | 21 mph NE | 36% |
| Thursday Night | 53°F | Chance Rain Showers | 15 to 20 mph NE | 36% |
| Friday | 67°F | Chance Rain Showers | 14 to 17 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Stony Brook (40.908, -73.127). Updated through the day.
Growing snapshot for Stony Brook
Last spring frost
Apr 15
First fall frost
Nov 10
Growing season
208 days
Hardiness zone
7b
More local growing data for Stony Brook: nearby ZIP 11790 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Setauket Strong, Ny (3.7 mi from Stony Brook). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.