Hop on a boat for a classic Alaska whale watching adventure. At the right time of year, you’re bound to see humpbacks and orcas congregate in the calm waters and put on a show. See them flip their tails above water or breach (when they leap all the way out of the water and then splash back down). With luck, you’ll get the breathtaking sight of bubble net feeding—a unique technique used by humpback whales circling and blowing bubbles to bring fish to the surface of the water when they spontaneously swim upward together.
The best time to whale watch is from April to November, when approximately 600 humpbacks inhabit the waters of the northern Inside Passage. Whale watching tours are offered in Juneau and near Glacier Bay. The orca, or killer whale, is also common to Juneau. But our Shamu doesn't jump through hoops like he does at Sea World. These whales, though much smaller than humpbacks, have been known to pursue seals, moose, and even other whales.
https://www.traveljuneau.com/things-to-do/whale-watching-wildlife-viewing/