Cold Spring Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cold Spring Harbor, a community in Suffolk County, New York.
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. Northeast wind around 10 mph.
7-day forecast for Cold Spring Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 10 mph NE | 0% |
| Saturday | 70°F | Partly Sunny | 7 to 10 mph E | 0% |
| Saturday Night | 56°F | Mostly Cloudy | 7 mph SE | 2% |
| Sunday | 71°F | Rain | 7 to 10 mph SE | 87% |
| Sunday Night | 57°F | Rain | 6 to 12 mph SE | 87% |
| Monday | 69°F | Chance Light Rain then Mostly Cloudy | 9 to 14 mph NE | 39% |
| Monday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 14 mph NE | 19% |
| Tuesday | 65°F | Chance Rain Showers | 15 mph NE | 25% |
| Tuesday Night | 52°F | Chance Rain Showers | 17 mph NE | 25% |
| Wednesday | 66°F | Slight Chance Rain Showers | 20 mph NE | 20% |
| Wednesday Night | 52°F | Chance Rain Showers | 21 mph NE | 33% |
| Thursday | 65°F | Chance Rain Showers | 21 mph NE | 33% |
| Thursday Night | 52°F | Chance Rain Showers | 20 mph NE | 39% |
| Friday | 66°F | Chance Rain Showers | 16 to 20 mph N | 39% |
Forecast source: National Weather Service (api.weather.gov) for Cold Spring Harbor (40.864, -73.456). Updated through the day.
Growing snapshot for Cold Spring Harbor
Last spring frost
Apr 9
First fall frost
Nov 10
Growing season
215 days
Hardiness zone
7b
More local growing data for Cold Spring Harbor: nearby ZIP 11724 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Centerport, Ny (4.5 mi from Cold Spring Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.