Weekends would be the busiest because a lot of us Florididians go when we are not working. That said, though no day is a too busy a day at Sea world. It isn't like other parks where you have to wait in long lines for anything. Usually the longest line is for food. LOL The 2 rides would be the other area with a waiton busy days. Arctic adventure is not a problem unless you go right after the whale show lets out. Everything else is just getting to the stadiums and finding a seat which isn't a big problem.