Setauket, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Setauket, a community in Suffolk County, New York.
This Afternoon
69°F
Mostly Sunny
Mostly sunny. High near 69, with temperatures falling to around 61 in the afternoon. Southwest wind 6 to 10 mph.
7-day forecast for Setauket
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 6 to 10 mph SW | 0% |
| Tonight | 52°F | Mostly Clear | 6 mph SW | 0% |
| Wednesday | 71°F | Mostly Sunny | 3 to 8 mph SW | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 6 mph SW | 0% |
| Thursday | 70°F | Slight Chance Rain Showers | 5 to 10 mph S | 23% |
| Thursday Night | 59°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 63% |
| Friday | 68°F | Showers And Thunderstorms | 7 mph S | 79% |
| Friday Night | 56°F | Showers And Thunderstorms then Light Rain | 6 mph SW | 79% |
| Saturday | 64°F | Light Rain Likely | 7 mph N | 66% |
| Saturday Night | 49°F | Chance Light Rain | 8 mph NW | 30% |
| Sunday | 60°F | Slight Chance Light Rain then Mostly Sunny | 8 mph NW | 15% |
| Sunday Night | 48°F | Partly Cloudy then Slight Chance Light Rain | 7 mph NW | 19% |
| Monday | 58°F | Chance Light Rain | 7 to 13 mph NW | 32% |
| Monday Night | 45°F | Chance Light Rain | 13 to 16 mph NW | 32% |
Forecast source: National Weather Service (api.weather.gov) for Setauket (40.949, -73.115). Updated through the day.
Growing snapshot for Setauket
Last spring frost
Apr 15
First fall frost
Nov 10
Growing season
208 days
Hardiness zone
7b
More local growing data for Setauket: nearby ZIP 11733 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Setauket Strong, Ny (1.3 mi from Setauket). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.