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
80°F
Chance Rain Showers
Patchy fog before 7am, then a chance of rain showers. Mostly sunny. High near 80, with temperatures falling to around 76 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Port Sulphur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Rain Showers | 5 mph SW | 26% |
| Tonight | 63°F | Patchy Fog | 0 mph | 10% |
| Thursday | 77°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 64°F | Partly Cloudy | 0 to 5 mph W | 3% |
| Friday | 76°F | Partly Sunny | 0 to 10 mph N | 11% |
| Friday Night | 59°F | Partly Cloudy | 0 to 10 mph N | 1% |
| Saturday | 72°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Saturday Night | 56°F | Partly Cloudy | 5 to 10 mph N | 1% |
| Sunday | 68°F | Slight Chance Rain Showers | 5 to 10 mph N | 15% |
| Sunday Night | 54°F | Partly Cloudy | 5 to 10 mph N | 5% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph NE | 7% |
| Monday Night | 55°F | Partly Cloudy | 0 to 5 mph N | 6% |
| Tuesday | 70°F | Sunny | 5 to 10 mph NE | 6% |
| Tuesday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 4% |
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 Nov 4, 2026.