Port Sulphur, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Sulphur, a community in Plaquemines County, Louisiana.
This Afternoon
89°F
Sunny
Sunny. High near 89, with temperatures falling to around 86 in the afternoon. Northeast wind 10 to 15 mph.
7-day forecast for Port Sulphur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 89°F | Sunny | 10 to 15 mph NE | 1% |
| Tonight | 76°F | Clear | 0 to 10 mph E | 1% |
| Saturday | 90°F | Sunny | 0 to 5 mph NE | 4% |
| Saturday Night | 77°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Sunday | 91°F | Sunny | 0 to 5 mph NE | 5% |
| Sunday Night | 77°F | Mostly Clear | 0 mph | 6% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph NE | 29% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 15% |
| Tuesday | 90°F | Sunny | 0 to 5 mph NE | 12% |
| Tuesday Night | 77°F | Mostly Clear | 0 to 5 mph NE | 12% |
| Wednesday | 90°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph NE | 18% |
| Wednesday Night | 76°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 18% |
| Thursday | 88°F | Slight Chance Showers And Thunderstorms | 10 to 20 mph NE | 16% |
| Thursday Night | 76°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 10 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Port Sulphur (29.505, -89.722). Updated through the day.
Growing snapshot for Port Sulphur
Last spring frost
Feb 3
First fall frost
Dec 28
Growing season
327 days
Hardiness zone
9b
More local growing data for Port Sulphur: nearby ZIP 70082 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lsu Citrus Rsch Stn, La (4.2 mi from Port Sulphur). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.