Flanders, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flanders, 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 Flanders
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 9 mph NW | 0% |
| Tonight | 58°F | Partly Cloudy | 2 to 10 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 10 mph E | 0% |
| Saturday Night | 57°F | Partly Cloudy | 3 to 7 mph E | 1% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 3 to 10 mph SE | 74% |
| Sunday Night | 59°F | Showers And Thunderstorms | 7 to 10 mph SE | 90% |
| Monday | 68°F | Rain Showers Likely | 14 mph NE | 68% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 16 mph NE | 28% |
| Tuesday | 65°F | Chance Rain Showers | 16 to 20 mph NE | 25% |
| Tuesday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 16 to 20 mph NE | 25% |
| Wednesday | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 20 to 23 mph NE | 16% |
| Wednesday Night | 55°F | Chance Rain Showers | 21 mph NE | 32% |
| Thursday | 65°F | Chance Rain Showers | 18 to 22 mph NE | 35% |
| Thursday Night | 55°F | Chance Rain Showers | 14 to 18 mph NE | 37% |
Forecast source: National Weather Service (api.weather.gov) for Flanders (40.889, -72.604). Updated through the day.
Growing snapshot for Flanders
Last spring frost
Apr 6
First fall frost
Nov 9
Growing season
215 days
Hardiness zone
7a
More local growing data for Flanders: nearby ZIP 11931 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Riverhead Rsch Farm, Ny (5.3 mi from Flanders). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.