If you planning to travel to Grand Isle Butterfly Dome, 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 11:29 AM. The temperature feels like 93.5 with a humidity level of 73 so dress accordingly. Cloud coverage is 6 percent with visibility at 13.9 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 5 MPH. At the end of the day don’t miss the sunset at 12:38 AM.