Your Guide to the Top Things to Do On Oahu

23 Go on a whale-watching tour

If clifftop or helicopter-bound whale-spotting with binoculars isn't as close to the action as you'd like, you can always book a dedicated whale-watching tour. The peak season for migrating humpbacks is between December and March, but you can spot these oceanic mammals as early as September and as late as May. A whale-watching tour from the harbors in the south and west of the island will get you up close to the mothers and calves while maintaining a 100-yard distance for the animals' safety.