We went to Boothbay Harbor in mid-September (whale season), and saw nothing. In fact, the entire experience was 3 hours and by the end of it most people were either sleeping or (in my case) seasick. Now, I know there are no guarantees, whales are wild animals, etc. However, in holding to their "whale sighting guarantee", this Whale Watch offered my boyfriend and me vouchers for another 3-hour trip with no guarantees after the long ride. I would keep an eye out for whales traveling around the islands off of BH or on your clambake, but I consider this a $75 mistake!