Grand Isle (Outside) Wind ForecastUnited StatesLAJefferson ParishGrand Isle (Outside)1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Grand Isle (Outside) wind forecast issued today at 7:34 am. Next forecast at approx. 7:34 pm.Grand Isle (Outside) Wind Statistics October WindPort Fourchon (18 miles)2025SeptemberOctoberStrongest – Average October–Strongest – Average September–Strongest – Average 2025–Climate (2011–Present)Port Fourchon (18 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 29 September, 202023mph NNEAverage –18mphGet WillyWeather+ to remove ads