Right now they are starting at 8:30pm. Not sure if that changes, i can imagine it does. I can see the June schedule but not finding anything beyond that. I'm not sure if they post it that far out. In other words, I'm no help!
We always watch the movies from the beachclub beach when we go in Sept. We usually walk over about 8pm and roast marshmellows and then the movie starts between 8-9(right when it gets dark). Here is the best site to see the schedule.