Bremer Bay

Bremer Bay: Orcas and South Coast WA

By ScubaDownUnder Team · 2026-07-31

# Bremer Bay Dive Site Guide

The orcas arrive at the surface in a single moment. A long black dorsal fin breaks the chop fifty metres off the bow, then another, then four more in a tight pod moving past at maybe ten knots. A spotter on the foredeck calls position. Within minutes, the engines drop to idle and snorkellers slip into the water, breath catching as the cold hits, while the pod circles to investigate. Bremer Bay, a small town on the south coast of Western Australia 500 kilometres south-east of Perth, has become the most reliable orca aggregation site in the southern hemisphere. The encounters happen 50 kilometres offshore at the head of the Bremer Canyon, an undersea geological feature dropping past 1,000 metres, between January and April each year. The town's diving identity now sits on this seasonal phenomenon, supported year-round by an inshore reef diving scene along the granite headlands of the south coast.

The Bremer Canyon is the deep-water feature that drives the aggregation. Sitting on the edge of the continental shelf, the canyon's vertical walls and upwelling currents concentrate nutrients and squid biomass into a feeding ground that draws orcas, sperm whales, pilot whales, beaked whales, and seasonal pelagic predators in numbers seen nowhere else on the Australian coast. The Wagyl Kaip and Southern Noongar peoples are the traditional custodians of the surrounding coastline. The town of Bremer Bay itself is small (population under 300 in winter), with no commercial airport and a single seasonal economy that swells through summer with whale watchers, divers, and recreational fishers. The canyon's biology has been documented progressively since 2014, when reliable orca encounter trips began running, and the area was nominated for marine park protection in 2023 under a State-led consultation process.

The diving experience splits cleanly into two distinct programmes. Inshore, the granite headlands east and west of Bremer Bay produce typical southern temperate reef diving: rock walls dropping from 5 to 30 metres, sponge gardens at depth, sea whip colonies, and patches of giant kelp forest on the more exposed promontories. Dive sites here are reached by short boat transit from the township and are diveable in calm weather across most of the year, though the south coast's exposure to Southern Ocean swell means dive days run in clusters between weather systems. Offshore at the canyon, the diving is genuinely different. Trips run as half- or full-day charters with up to two hours each way of open-ocean transit, snorkel-only interaction with the cetaceans under regulatory protocols, and a small window of in-water time per encounter. The two experiences attract different divers and rarely combine in a single trip itinerary.

The orcas are the headline. Australian Type A and Type B orcas have been identified at the canyon across multiple seasons, with pods of three to fifteen animals routinely observed and individual identification photographs allowing researchers to track returning matrilines year over year. Surface behaviour ranges from passive transit to active predation events on tuna, beaked whales, and (rarely) sperm whales, the last of which has been documented by tour operators with photographic evidence. Sperm whales themselves appear at the canyon between January and April, with calving and nursing pods recorded close to shore. Pilot whales are present in larger numbers and approach boats with the curiosity characteristic of the species. Inshore, the granite reefs hold the southern temperate assemblage: southern leafy seadragons in protected coves, western blue groper on the deeper sites, harlequin fish, breaksea cod, and the densely encrusted sponge and ascidian communities typical of WA's south coast. Australian fur seals haul out on offshore islets and are encountered occasionally on charter dives.

Visibility runs 10 to 20 metres on inshore reefs through the summer diving window, with the cleanest water in February and March when the swell settles and surface conditions are at their best. Offshore at the canyon, surface conditions dominate the experience: the open ocean fetch is unfiltered, and trips run only when the forecast aligns. Water temperature is the south-coast winter standard, 15°C in late winter rising to 21°C in February. A 7mm full suit is the minimum comfortable kit for repetitive dives, with drysuits common among regular south-coast divers. The diving season inshore runs December through April, and the canyon orca season is January to April with peak reliability through February and March. Outside this window, charter operations are limited to inshore work and weather-dependent day trips, with most operators standing down through winter.

The deep-water character of Bremer Bay rewards divers prepared for the trade-off. The canyon trips are long, weather-windowed, and surface-only by regulation, which means the in-water experience is shorter than a typical scuba day, but the cetacean encounters are unmatched. The inshore reef diving offers a separate, more accessible programme for divers wanting hard-bottom temperate work without the offshore commitment. Photographers should plan trips around the new moon for the canyon work (calmer surface conditions) and the spring tides for inshore reef visibility. Researchers and dedicated wildlife photographers often book consecutive multi-day blocks to maximise canyon encounter probability across a single trip. For divers wanting both, the canyon programme is usually best treated as the destination with inshore reef dives as supplementary days when weather closes the offshore site.

Bremer Bay belongs to a small set of Australian dive destinations defined by a single seasonal phenomenon. The orcas come back. The canyon biology builds across the summer. The town empties between seasons. Few divers visit casually, but those who plan around the calendar leave with encounters that few other places on the continent can deliver.

## Site Access and Logistics

Bremer Bay is reached by sealed road from Perth (500 kilometres, 5.5 hours driving) via Albany (180 kilometres east of Bremer Bay) or directly through the inland route via Borden. There is no commercial airport in town; the nearest is Albany Airport, two hours west. The main canyon-charter operator is Naturaliste Charters, which runs daily orca expeditions through the season from Bremer Bay marina. Bremer Canyon Killer Whale Expeditions and several specialist research-led charters also operate during peak season. All orca encounters are conducted as snorkel-only trips under regulation by the WA Department of Biodiversity, Conservation and Attractions; scuba is not permitted with the cetaceans. Inshore reef dives are run by local PADI charter operators on calm weather days; bookings are best arranged from Albany or Esperance dive shops with crews that travel for charter work. Accommodation in Bremer Bay runs from camping at the Bremer Bay Caravan Park to mid-range resort options including the Bremer Bay Beaches Resort. Book canyon-season trips six to twelve months ahead.

## Sources

- [Naturaliste Charters — Bremer Canyon orca expeditions](https://www.naturalistecharters.com.au) - [Project ORCA — orca research and identification at Bremer Canyon](https://www.projectorca.com.au) - [Department of Biodiversity, Conservation and Attractions WA — Bremer Bay marine park consultation](https://www.dbca.wa.gov.au) - [WA Museum — Bremer Canyon cetacean records](https://museum.wa.gov.au) - [Michael McFadyen's Scuba Diving — south coast WA notes](http://www.michaelmcfadyenscuba.info)