Riverhead, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverhead, a community in Suffolk County, New York.
This Afternoon
79°F
Sunny
Sunny, with a high near 79. Northwest wind around 9 mph.
7-day forecast for Riverhead
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 9 mph NW | 0% |
| Tonight | 57°F | Partly Cloudy | 3 to 12 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 8 to 12 mph E | 0% |
| Saturday Night | 55°F | Partly Cloudy | 3 to 7 mph SE | 1% |
| Sunday | 70°F | Showers And Thunderstorms | 3 to 12 mph SE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms | 6 to 13 mph SE | 89% |
| Monday | 68°F | Rain Showers Likely | 13 to 16 mph NE | 65% |
| Monday Night | 54°F | Chance Rain Showers | 12 to 17 mph NE | 27% |
| Tuesday | 65°F | Chance Rain Showers | 21 mph NE | 25% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 17 to 21 mph NE | 24% |
| Wednesday | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 24 mph NE | 15% |
| Wednesday Night | 54°F | Chance Rain Showers | 22 mph NE | 32% |
| Thursday | 65°F | Chance Rain Showers | 23 mph NE | 35% |
| Thursday Night | 53°F | Chance Rain Showers | 15 to 21 mph NE | 36% |
Forecast source: National Weather Service (api.weather.gov) for Riverhead (40.951, -72.676). Updated through the day.
Growing snapshot for Riverhead
Last spring frost
Apr 6
First fall frost
Nov 9
Growing season
215 days
Hardiness zone
7a
More local growing data for Riverhead: nearby ZIP 11901 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, Riverhead Rsch Farm, Ny (4.3 mi from Riverhead). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.