The annual event Sunfest is the official end of the summer season in Ocean City. This year Sunfest is September 22nd to the 25th. However, I know that The inside rides at Trimper's will stay open on weekends throughout October.
the summer season usually ends in mid September for the weather tv folks... in ocean city day after labor day Monday in September when kids go back to school ... trimpers is open sat and sun only through October I think..
Get quick answers from Trimper's Rides and Amusement Park staff and past visitors.