Grand Isle Wind ForecastUnited StatesLAJefferson ParishGrand Isle1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Grand Isle wind forecast issued yesterday at 11:33 pm. Next forecast at approx. 11:33 am.Grand Isle Wind Statistics August WindPort Fourchon (14.9 miles)2025JulyAugustStrongest – Average August–Strongest – Average July–Strongest – Average 2025–Climate (2011–Present)Port Fourchon (14.9 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 21 September, 202034.4mph ESEAverage 2020–202010.8mphGet WillyWeather+ to remove ads