Great River, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Great River, a community in Suffolk County, New York.
Today
81°F
Mostly Sunny
Mostly sunny. High near 81, with temperatures falling to around 79 in the afternoon. East wind 3 to 7 mph.
7-day forecast for Great River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Mostly Sunny | 3 to 7 mph E | 0% |
| Tonight | 67°F | Mostly Cloudy | 2 to 6 mph E | 7% |
| Wednesday | 81°F | Partly Sunny then Slight Chance Rain Showers | 2 to 8 mph E | 17% |
| Wednesday Night | 72°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph S | 22% |
| Thursday | 84°F | Mostly Sunny | 6 to 14 mph SW | 11% |
| Thursday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 7 to 14 mph SW | 17% |
| Friday | 85°F | Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 15% |
| Friday Night | 73°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 12 mph SW | 31% |
| Saturday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 20% |
| Saturday Night | 73°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 12 mph SW | 27% |
| Sunday | 84°F | Mostly Sunny | 6 to 10 mph SW | 13% |
| Sunday Night | 73°F | Mostly Clear | 6 to 10 mph SW | 10% |
| Monday | 85°F | Sunny | 6 to 12 mph SW | 8% |
| Monday Night | 73°F | Slight Chance Rain Showers | 7 to 12 mph W | 19% |
Forecast source: National Weather Service (api.weather.gov) for Great River (40.713, -73.176). Updated through the day.
Growing snapshot for Great River
Last spring frost
Apr 4
First fall frost
Nov 11
Growing season
219 days
Hardiness zone
7b
More local growing data for Great River: nearby ZIP 11739 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Molloy Cercom, Ny (4 mi from Great River). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.