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.
Tonight
54°F
Partly Cloudy then Patchy Fog
Patchy fog after midnight. Partly cloudy, with a low around 54. Southwest wind 3 to 7 mph.
7-day forecast for Great River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Partly Cloudy then Patchy Fog | 3 to 7 mph SW | 3% |
| Wednesday | 70°F | Patchy Fog then Sunny | 3 to 12 mph SW | 3% |
| Wednesday Night | 59°F | Partly Cloudy | 9 mph SW | 1% |
| Thursday | 69°F | Slight Chance Rain Showers | 7 to 13 mph S | 17% |
| Thursday Night | 61°F | Rain Showers | 8 to 12 mph SW | 83% |
| Friday | 67°F | Showers And Thunderstorms | 9 mph SW | 93% |
| Friday Night | 56°F | Showers And Thunderstorms | 7 mph W | 93% |
| Saturday | 64°F | Rain Showers Likely | 10 mph NW | 60% |
| Saturday Night | 45°F | Slight Chance Rain Showers | 10 mph NW | 19% |
| Sunday | 60°F | Slight Chance Rain Showers then Mostly Sunny | 10 mph W | 17% |
| Sunday Night | 42°F | Partly Cloudy then Slight Chance Light Rain | 8 to 12 mph W | 15% |
| Monday | 59°F | Chance Light Rain | 12 to 17 mph NW | 26% |
| Monday Night | 42°F | Chance Light Rain | 15 mph W | 26% |
| Tuesday | 60°F | Slight Chance Light Rain then Mostly Sunny | 15 to 18 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
Nearby towns & communities
Amagansett
Amityville
Aquebogue
Asharoken
Babylon
Baiting Hollow
Bay Shore
Bayport
Baywood
Belle Terre
Bellport
Blue Point
Bohemia
Brentwood
Bridgehampton
Brightwaters
Brookhaven
Calverton
Captree
Center Moriches
Centereach
Centerport
Central Islip
Cold Spring Harbor
Commack
Copiague
Coram
Cutchogue
Deer Park
Dering Harbor
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 Nov 4, 2026.