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.
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. East wind 3 to 7 mph.
7-day forecast for Mastic Beach
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 3 to 7 mph E | 0% |
| Tonight | 67°F | Mostly Cloudy | 2 to 6 mph E | 11% |
| Wednesday | 79°F | Partly Sunny | 2 to 8 mph E | 12% |
| Wednesday Night | 73°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph S | 19% |
| Thursday | 82°F | Mostly Sunny | 7 to 14 mph SW | 10% |
| Thursday Night | 75°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 8 to 14 mph SW | 15% |
| Friday | 83°F | Sunny | 8 to 13 mph SW | 9% |
| Friday Night | 74°F | Chance Showers And Thunderstorms | 7 to 13 mph SW | 25% |
| Saturday | 82°F | Mostly Sunny | 6 to 12 mph SW | 13% |
| Saturday Night | 73°F | Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 24% |
| Sunday | 82°F | Mostly Sunny | 6 to 12 mph SW | 14% |
| Sunday Night | 74°F | Mostly Clear | 6 to 10 mph SW | 9% |
| Monday | 84°F | Sunny | 6 to 13 mph SW | 7% |
| Monday Night | 73°F | Slight Chance Rain Showers | 7 to 12 mph W | 17% |
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 Aug 4, 2026.