Scuba Diving in Algoa Bay

Diving in Algoa Bay serves up a mix you won't find on many South African coastlines: soft-coral reefs, a diveable navy wreck, offshore seamounts full of raggies, and penguin islands, all in one bay off Gqeberha in the Eastern Cape. The bay is officially the bottlenose dolphin capital of the world, home to a population estimated in the tens of thousands, and it sits on the migration route for humpback and southern right whales. This is where the warm-temperate Indian Ocean starts to cool toward the Cape, so you get colourful invertebrate reefs alongside cool-water marine life.

The diving splits between accessible inshore sites and exposed offshore seamounts. Close in, sites like Bell Buoy and the scuttled SAS Haerlem frigate suit most levels, with gullies, arches, and pinnacles draped in soft coral and full of fish. Further out, seamounts like Evans Peak and Riy Banks rise from deep water, covered in soft coral and patrolled by ragged-tooth sharks, but they're weather-dependent and reserved for advanced divers. Water runs cool, roughly 15 to 22 °C (59 to 72 °F), so plan on a 5 mm to 7 mm wetsuit, and visibility typically sits between 5 and 20 m (16 to 66 ft), often clearer on the outer reefs.

There's more to Algoa Bay than the reefs. St Croix and Bird Island hold major African penguin colonies, part of a marine reserve of gullies, drop-offs, and caves. Great white cage diving has become established here, making Algoa Bay a newer alternative to the Western Cape cage-diving hubs. Add the dolphins and seasonal whales, and a few days here can pack in reef dives, a wreck, sharks, and some of the best marine wildlife watching in the country. Diving is by boat out of Gqeberha, with inshore sites just minutes away and the seamounts a longer, weather-permitting run.

Best dive sites in Algoa Bay

The best dive sites in Algoa Bay run from easy inshore reefs and a wreck to exposed offshore seamounts for experienced divers.

Bell Buoy

Bell Buoy is Algoa Bay's most accessible reef dive and a favourite for its colour and variety. A landscape of gullies, arches, and pinnacles runs from about 5 to 20 m (16 to 66 ft), draped in soft coral and home to octopus, ragged-tooth sharks, and a dense cast of reef fish. The moderate depth and easy access make it a great site for most levels and a strong first dive in the bay.

Depth: 5–20 m (16–66 ft) | Level: All Levels

SAS Haerlem Wreck

The SAS Haerlem is a navy frigate scuttled in Algoa Bay in 1987 to create an artificial reef, and she's now one of the bay's most rewarding dives. The deck sits at around 18 m with the stern near 21 m (59 to 69 ft), and the structure is riddled with holes, nooks, and crannies that shelter shy sharks, nudibranchs, soft corals, and swarms of fish. It's a classic wreck dive best suited to divers with a little experience.

Depth: 18–21 m (59–69 ft) | Level: Intermediate

Evans Peak

Evans Peak is an exposed seamount more than 16 km offshore, and because it's open to the weather you can't dive it every day. A single pinnacle rises to about 15 m (49 ft) below the surface, its walls carpeted in soft coral and thick with fish, which in turn draws in ragged-tooth sharks. When conditions line up, it's one of the bay's standout dives, but the distance, exposure, and depth make it advanced territory.

Depth: 15–30 m (49–100 ft) | Level: Advanced

Riy Banks

Riy Banks is the other premier seamount, a distant, exposed reef on the far side of the bay known for superb drop-offs and walls. Depths run to 30 m (100 ft) and beyond, visibility is usually good out here, and the offshore position brings the chance of bigger fish and passing pelagics. Like Evans Peak, it's weather-dependent and strictly for advanced divers comfortable with depth and current.

Depth: 18–30 m (59–100 ft) | Level: Advanced

Thunderbolt Reef

Thunderbolt Reef is a cluster of pinnacles rising from a seabed around 24 m (79 ft) down, off the Cape Recife side of the bay. The reef structure is scenic and fishy, with soft coral and the usual Algoa Bay reef life, and its more sheltered position makes it diveable on days when the far seamounts are blown out. It's a good intermediate option when you want reef structure without the long offshore run.

Depth: 12–24 m (39–79 ft) | Level: Intermediate

Explore more dive sites with Divearoo's Dive Site Explorer.

Best time to dive Algoa Bay

The best time to dive Algoa Bay is the warmer, calmer stretch from spring into autumn, though the bay has something to offer year-round.

Spring through autumn generally brings the calmest seas and the best shot at diving the exposed offshore seamounts, which is when Evans Peak and Riy Banks open up. Winter cools and roughens things, but it's prime time for whales, humpbacks move through from June, and for great white cage diving. Bottlenose dolphins are resident year-round, so the bay's signature encounter is always on the table.

Diving conditions

Marine life in Algoa Bay

Marine life in Algoa Bay reflects its position where warm and cool currents meet, so soft-coral reefs and warm-water fish share the bay with cool-water sharks, seals, penguins, and one of the largest bottlenose dolphin populations on Earth. It's as much a marine wildlife destination as a reef-diving one.

• Bottlenose dolphins (Tursiops aduncus): year-round — Algoa Bay is the bottlenose dolphin capital of the world, with pods that can number in the hundreds.
• Ragged-tooth sharks (Carcharias taurus): year-round, especially at Evans Peak and Bell Buoy — drawn to the soft-coral reefs and seamounts across the bay.
• African penguins (Spheniscus demersus): year-round, especially around St Croix and Bird Island — the bay's islands hold major colonies of this endangered species.
• Humpback whales (Megaptera novaeangliae): June to January — pass through on migration along the Eastern Cape coast.
• Southern right whales (Eubalaena australis): June to November — winter visitors to the bay and nearby coast.
• Great white sharks (Carcharodon carcharias): winter — the focus of Algoa Bay's growing cage-diving scene.

Discover more marine life on Divearoo's global heatmap.

Marine conservation

Algoa Bay is a conservation hotspot, and not without pressure. St Croix and Bird Island hold globally important African penguin colonies, but this endangered species has declined steeply, and the bay's heavy shipping and bunkering traffic have earned it a reputation as one of the noisiest bays in the world, a real threat to its penguins, dolphins, and whales. The bay falls partly within the Addo Elephant National Park Marine Protected Area, which protects the islands and surrounding waters. As a diver you can help by choosing operators who follow responsible wildlife-watching distances, keeping clear of the penguin colonies, and never touching the reefs or their soft corals. Read more about Divearoo's Conservation First policies

Practical information

Dive prices

• Fun dives: roughly R500–800 per dive (about $28–45), depending on inshore versus offshore seamount trips (confirm current rates with local operators)
• Cage diving: great white cage-diving trips are priced separately as full-day outings
• Gear rental: R300–500 per day for a full set

Getting there

Fly into Chief Dawid Stuurman International Airport at Gqeberha (still widely called Port Elizabeth or PE), which connects easily to Johannesburg and Cape Town. Dive operators launch from the city, with the inshore reefs and the Haerlem wreck just minutes offshore and the seamounts a longer, weather-dependent run. Gqeberha is a full-service city, so accommodation, dining, and dive shops are all easy to sort. Check the current location of the nearest operational hyperbaric chamber with your operator, and dive conservatively on the deeper offshore sites.