Average water temperature in Gretna
The mean water temperature over the year in Gretna (Louisiana), the United States of America.
- On average, August has the warmest water temperature with 28°C.
- On average, March has the coldest water temperature with 20°C.
Forecast for Gretna (LA)
partly cloudy and rain
partly cloudy and chance of slight rain
partly cloudy and chance of slight rain