Mastic Beach, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mastic Beach, a community in Suffolk County, New York.
This Afternoon
78°F
Sunny
Sunny, with a high near 78. Northwest wind around 8 mph.
7-day forecast for Mastic Beach
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 8 mph NW | 0% |
| Tonight | 59°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Saturday | 67°F | Mostly Sunny | 8 to 12 mph E | 0% |
| Saturday Night | 60°F | Partly Cloudy | 5 to 8 mph SE | 2% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 6 to 14 mph S | 70% |
| Sunday Night | 61°F | Showers And Thunderstorms | 10 to 15 mph SW | 90% |
| Monday | 67°F | Rain Showers Likely | 14 to 18 mph NE | 68% |
| Monday Night | 57°F | Chance Rain Showers | 14 to 21 mph NE | 28% |
| Tuesday | 64°F | Chance Rain Showers | 23 mph NE | 27% |
| Tuesday Night | 56°F | Chance Rain Showers then Mostly Cloudy | 21 to 25 mph NE | 27% |
| Wednesday | 64°F | Slight Chance Rain Showers | 23 to 26 mph NE | 17% |
| Wednesday Night | 56°F | Chance Rain Showers | 23 to 26 mph NE | 35% |
| Thursday | 63°F | Chance Rain Showers | 22 to 26 mph NE | 37% |
| Thursday Night | 55°F | Chance Rain Showers | 17 to 21 mph NE | 37% |
Forecast source: National Weather Service (api.weather.gov) for Mastic Beach (40.766, -72.837). Updated through the day.
Growing snapshot for Mastic Beach
Last spring frost
Apr 18
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
7a
More local growing data for Mastic Beach: nearby ZIP 11951 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Shirley Brookhaven Ap, Ny (4.2 mi from Mastic Beach). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.