A few kilometres off the coast near Gansbaai, two low islands sit in the Atlantic. Dyer Island is flat and bird-covered, an Important Bird Area managed by CapeNature and home to breeding African penguins and other seabirds. Beside it, Geyser Rock is packed with Cape fur seals; the Dyer Island Conservation Trust puts the colony at around 60,000. The narrow channel between them is known as Shark Alley.
This small patch of sea is the heart of what locals call the Marine Big Five: whales, dolphins, sharks, seals and penguins. It is ten minutes from De Kelders.
Getting out on the water
Boats leave from the small harbour at Kleinbaai, just past Gansbaai. Several licensed operators run trips, usually in the morning when the sea is calmer. Choices include marine “Big Five” eco-tours, seasonal boat-based whale watching and shark cage diving. Trips depend on the weather and are often rescheduled when the swell is up, so it is wise to leave a spare morning in your plans.
What you see will vary by season and by day. Southern right whales fill Walker Bay from roughly June to November, and humpback and Bryde’s whales also pass through. Dolphins are seen often. The seals of Geyser Rock are a near-certainty: the noise and smell reach you before the boat slows. Penguins can sometimes be spotted in the water or on Dyer Island’s shoreline.
About the sharks
For two decades Gansbaai was famous around the world as the place to see great white sharks, and the photographs from those years are extraordinary. The picture has changed, and we would rather tell you so.
In 2017, a pair of orcas began hunting white sharks in the area. Research published after the event documented white shark carcasses washing ashore and the remaining sharks leaving the area. Great white sightings at Gansbaai have been rare since then. Scientists are still debating the wider causes and the state of South Africa’s white shark population. In their absence, bronze whaler sharks, powerful predators up to around three metres long, have become the regular sightings on shark trips.
If you go cage diving here today, expect bronze whalers rather than great whites. A good operator will tell you this before you book. Many visitors still find it a thrilling experience, and the wider ecosystem, with its seals, birds and whales in season, is worth the trip on its own.
Choosing an operator well
We don’t recommend specific companies here. These questions help separate the best from the rest:
- Is it licensed for the activity you want (boat-based whale watching and shark cage diving both require permits in South Africa)?
- Does it support research or conservation? Some operators work with local marine research and seabird rehabilitation.
- Is it honest about sightings? Be wary of guarantees, especially about great whites.
- How does it treat the animals? Look for respectful approach distances, no harassment of wildlife and clear briefings.
- What happens if the sea is rough? Good operators postpone and rebook without fuss.
The penguins of Dyer Island
The African penguin is now critically endangered, and the Dyer Island colony has declined dramatically in recent decades. On land in Kleinbaai, the African Penguin & Seabird Sanctuary (APSS), a Dyer Island Conservation Trust project that opened in 2015, rescues and rehabilitates injured, oiled, sick and abandoned seabirds, with a special focus on penguins. It welcomes visitors and entry is free. Check current visiting times before you go. It is a moving, human-scale counterpoint to the drama out at sea, and a good place to take children.
A morning, well spent
The classic rhythm is to leave early from Kleinbaai, return by lunchtime salty and windswept, and warm up with a late lunch in Gansbaai. Visit the penguin sanctuary, then drive back to De Kelders in time to watch the light change over the bay.
Stay here
A home base ten minutes from Kleinbaai makes an early boat easy. See our sample stay, Villa Stilte, to picture it. It is illustrative only, not a bookable property. If you own a home near Gansbaai or De Kelders, we would like to hear from you.
