Port Sulphur, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Sulphur, a community in Plaquemines County, Louisiana.
Today
91°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 3pm. Sunny. High near 91, with temperatures falling to around 89 in the afternoon. West wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Port Sulphur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 21% |
| Tonight | 78°F | Mostly Clear | 0 to 5 mph W | 5% |
| Wednesday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 18% |
| Wednesday Night | 77°F | Mostly Clear | 0 to 5 mph SW | 2% |
| Thursday | 90°F | Sunny | 0 to 5 mph E | 10% |
| Thursday Night | 77°F | Mostly Clear | 0 to 5 mph E | 10% |
| Friday | 89°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph E | 22% |
| Friday Night | 77°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 16% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 10 mph E | 38% |
| Saturday Night | 78°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 26% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 51% |
| Sunday Night | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 31% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 49% |
| Monday Night | 77°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 30% |
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 Aug 4, 2026.