Whale & Dolphin Watch
Resident sperm whales year-round, thanks to a canyon that starts almost at the beach.
Kaikōura on the east coast of the South Island offers something very unusual: resident sperm whales, present all year, within a short boat ride of shore. The reason is geological — an underwater canyon over 1,000 metres deep begins only a few kilometres out.
The Kaikōura canyon
Cold northward currents meet warm southward ones over the canyon, driving nutrients up from the deep. That feeds an enormous population of squid, which feeds the sperm whales, which stay put rather than migrating through.
Sperm whales are the largest toothed predators on earth and dive for 45 minutes at a time. Boats locate them by hydrophone between dives, so sightings are common but never guaranteed — most operators offer a partial refund if no whale is seen.
Humpbacks pass in June and July, orca appear year-round, and dusky dolphins gather in pods that can run to several hundred animals.
Swimming with dolphins
Kaikōura permits supervised swimming with dusky dolphins, which are wild, curious and famously acrobatic. You do not touch or chase them; the technique is to make noise and move so they choose to stay.
In Akaroa near Christchurch, the draw is Hector's dolphin — at around 1.4 metres, the world's smallest and rarest marine dolphin, found nowhere but New Zealand. The critically endangered Māui subspecies off the west coast of the North Island numbers only a few dozen adults.
Elsewhere on the coast
The Bay of Islands has resident bottlenose and common dolphins and regular orca visits. Since 2019, permitted swim-with-dolphin operations there have been restricted to protect a declining local population.
The Otago Peninsula near Dunedin holds northern royal albatross at Taiaroa Head — the only mainland breeding colony in the world — along with yellow-eyed penguins and New Zealand sea lions.
Header photograph by Mathijs van den Berg via Wikimedia Commons, licensed CC BY / CC BY-SA.