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
68°F
Sunny
Sunny. High near 68, with temperatures falling to around 62 in the afternoon. South wind around 7 mph.
7-day forecast for Riverhead
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Sunny | 7 mph S | 0% |
| Tonight | 57°F | Mostly Cloudy | 6 mph SW | 2% |
| Thursday | 70°F | Partly Sunny | 6 to 13 mph S | 14% |
| Thursday Night | 59°F | Light Rain | 6 to 10 mph SW | 77% |
| Friday | 67°F | Rain | 6 mph SW | 81% |
| Friday Night | 53°F | Rain | 2 mph SW | 80% |
| Saturday | 64°F | Slight Chance Light Rain | 3 to 8 mph W | 22% |
| Saturday Night | 44°F | Chance Light Rain | 8 to 14 mph W | 26% |
| Sunday | 59°F | Chance Light Rain then Mostly Sunny | 14 mph NW | 26% |
| Sunday Night | 41°F | Partly Cloudy | 10 to 14 mph W | 2% |
| Monday | 58°F | Sunny | 16 mph W | 12% |
| Monday Night | 40°F | Mostly Clear | 9 to 13 mph W | 11% |
| Tuesday | 60°F | Sunny | 14 mph W | 2% |
| Tuesday Night | 41°F | Mostly Clear | 9 mph W | 2% |
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
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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 Nov 5, 2026.