Elevated ocean panoramas give Plettenberg Bay outstanding vantages for watching southern right whales during their breeding season between June and October. An especially good vantage point is the area between the wreck of the Athene at the southern end of Lookout Beach and the Keurbooms River. The Robberg Peninsula is also excellent, looming protectively over this whale nursery and giving a grandstand view of the bay. Other good town viewpoints are from Beachy Head Road at Robberg Beach; Signal Hill in San Gonzales Street past the post office and police station; the Beacon Island Hotel on Beacon Island; and the deck of The Lookout restaurant on Lookout Beach.
Outside Plett, the Kranshoek viewpoint and hiking trail offers wonderful whale-watching points along the route. To get there, head for Knysna, taking the Harkerville turn-off, and continue for 7km. It's also possible to view the occasional pair (mother and calf) at Nature's Valley, 29km east of Plett on the R102, and from Storms River Mouth. For more information about whales, see the section on Whale-watching and other activities.