Hi Mario, welcome to Cruise-Chat. I have seen dolphin in Grenada, but not whales, so I'm not sure what you would see. But, I have seen the dolphins very close to the boat. If you like snorkeling, Flamingo Bay is great! Be sure to go to the Grand Anse beach. There is a water taxi that leaves from the pier and runs over there about every 30 minutes. It's a beautiful beach! Hope you have a fantastic cruise! Best wishes