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.
This Afternoon
69°F
Partly Sunny
Partly sunny. High near 69, with temperatures falling to around 63 in the afternoon. South wind around 9 mph.
7-day forecast for Stony Brook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Partly Sunny | 9 mph S | 0% |
| Tonight | 53°F | Patchy Fog | 6 mph SW | 3% |
| Wednesday | 70°F | Patchy Fog then Sunny | 3 to 10 mph SW | 3% |
| Wednesday Night | 58°F | Partly Cloudy | 5 to 8 mph S | 2% |
| Thursday | 70°F | Slight Chance Rain Showers | 5 to 10 mph S | 19% |
| Thursday Night | 60°F | Rain Showers | 6 to 9 mph SW | 84% |
| Friday | 67°F | Showers And Thunderstorms | 7 mph S | 91% |
| Friday Night | 55°F | Showers And Thunderstorms | 6 mph W | 91% |
| Saturday | 64°F | Rain Showers Likely | 8 mph NW | 60% |
| Saturday Night | 45°F | Slight Chance Rain Showers | 9 mph NW | 21% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 9 mph W | 19% |
| Sunday Night | 43°F | Partly Cloudy | 7 to 10 mph W | 14% |
| Monday | 58°F | Chance Light Rain | 10 to 15 mph NW | 26% |
| Monday Night | 42°F | Chance Light Rain | 13 mph W | 26% |
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 Nov 4, 2026.