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 1:29 pm. Next forecast at approx. 1:29 am. Wind Speed Wind GustGrand Isle (Outside) Wind Statistics October WindPort Fourchon (18 miles)2026SeptemberOctoberStrongest – Average October–Strongest – Average September–Strongest – Average 2026–Climate (–)Port Fourchon (18 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 29 September, 202023 mph NNEAverage –18 mphGet WillyWeather+ to remove ads