Whale watching trips now leave daily. Most boats offer one main whale watching trip per day, with dolphin watching trips in the morning and evening. Dolphin Watch trip that lasts about two hours. These trips go farther offshore. These late tours won't start until after Memorial Day.
Whales are unpredictable critters, but schools of dolphins are usually plentiful.
You'll also get to see seabirds that spend the majority of their lives on the ocean. And the views are fantastic. Make sure to bring a jacket or sweater, even in the summer. It's a lot chillier on the water than it is on land. Binoculars and a camera are nice to have, as well.