If you are planning a trip to New Zealand’s stunning Canterbury region, a visit to the historic French-inspired township of Akaroa is an absolute must-have on your itinerary. Nestled inside the crater of an extinct volcano, the sheltered waters of Akaroa Harbour are world-famous for one special reason: they are the home of the Hector’s dolphin, the world’s smallest and rarest marine dolphins.

A common question we receive from travellers planning their New Zealand holiday is: Are dolphins in Akaroa all year round?

The short answer is yes! Hector’s dolphins live in the waters around Akaroa 365 days a year, making it a fantastic destination for wildlife lovers whether you visit in the peak of summer or the crisp depths of winter.

Do Hector’s Dolphins Leave Akaroa in Winter?

No, Hector’s dolphins do not migrate away from Akaroa during the winter months. Unlike some marine species that travel thousands of kilometres to warmer breeding grounds, Hector’s dolphins are endemic to New Zealand and remain in local coastal waters year-round.

While New Zealand experiences seasonal weather shifts—ranging from warm, sun-drenched summer days in January to crisp, clear winter mornings in July—the protected geography of Akaroa Harbour provides a stable, safe environment for the dolphins through every season.

Seasonal Breakdown of Dolphin Spotting in Akaroa:

• Summer (December – February): Characterised by warm weather, calm seas, and high visitor numbers. Water temperatures rise, and the dolphins are frequently active, often riding the bow waves of our catamarans.

• Autumn (March – May): The harbour waters remain pleasant, tourist crowds begin to thin, and the crisp autumn days offer mirror-like water conditions that make spotting dolphins breaching the surface effortless.

• Winter (June – August): Akaroa Harbour experiences a unique, serene beauty in winter. Snow-dusted volcanic peaks surround crystal-clear, calm waters. Because Hector’s dolphins stay put, winter is a remarkably peaceful time to join a nature cruise, often with fewer boats on the water and high chances of intimate wildlife encounters.

• Spring (September – November): Spring brings new life to the harbour. It is a season of transition, warmer weather, and increased biological activity in the marine ecosystem, keeping the dolphins active and playful.

When Can You Swim with Dolphins in Akaroa?

While you can view the dolphins from our vessels all year round, a popular question for visitors looking to get in the water is: What time of year is the dolphin swim season?

Our guided dolphin swimming experiences run seasonally from October 1st to April 30th (spanning the warmer spring, summer, and early autumn months).

Because Hector’s dolphins are a protected native species, swimming experiences are heavily regulated by the Department of Conservation (DOC):

• Strict Regulations: Encounters are carefully managed during the warmer months so the dolphins are never chased or disrupted.

• Wetsuits Provided: Specialised thick wetsuits, masks, and snorkels are provided by operators to keep you comfortable as you transition into the water.

• An Unforgettable Connection: Having a curious Hector’s dolphin swim in circles around you while clicking and whistling underwater is a truly life-changing experience. (Note: Touching or feeding is strictly prohibited to keep them wild and safe).