If you planning to travel to Grand Isle State Park, Grand Isle, Louisiana, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 12:21 PM. The temperature feels like 76.9 with a humidity level of 94 so dress accordingly. Cloud coverage is 88 percent with visibility at 8.1 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling northeast at a speed of 14 MPH. At the end of the day don’t miss the sunset at 11:06 PM.