Humpback Whale season with SLO.TOURS “San Luis Obispo Tours” starts July 1st 2019 for Whale Watching in Avila Beach / Port San Luis. California’s best place to visit Whales and Dolphins. SLO.TOURS provides a 6 passenger power boat for Whale Watching and Coastal Charters. Departs in Port San Luis. Literally the best day ever boat adventures in the area. Check out numerous reviews in the links below.