Mossel Bay scuba diving is a good answer to the Cape's wind problem. The town sits at the western end of the Garden Route, roughly halfway along the coast between Cape Town and Gqeberha. Its bay faces north and east, so it is sheltered from the big south-westerly swells that roll up this coast for much of the year. When other spots are blown out, Mossel Bay is often still diveable.
The water is usually warmer than around Cape Town, and the reefs show it: soft corals, sea fans and sponges in orange, yellow and pink, with fish life that mixes cool-water and warmer-water species. It is also a historic place. In 1488 the Portuguese explorer Bartolomeu Dias landed here, among the first Europeans to round the southern tip of Africa.
What you will see
Shallow reefs near the town are covered in invertebrate life, which makes the area a favourite with photographers. Look for nudibranchs, octopus, crayfish, sea stars and small endemic catsharks such as the pyjama catshark. Shoals of reef fish move over the rocks, and rays rest on sandy patches. Seal Island, in the bay, is home to a colony of Cape fur seals, and boat trips around it are common.
Where to dive
Reefs off Santos Beach
The north-facing beach beside town gives sheltered access to shallow rocky reefs. A good place for a first dive in the area.
Seal Island and the bay
Boat trips go out to the seal colony and nearby reefs. Seals are curious and fast; let them come to you.
Deeper offshore reefs
Local boats run to deeper pinnacles with bigger sea fans and more fish when the conditions allow.
Site names and access change over time, so ask a Mossel Bay dive centre which reefs are running and what the visibility is like before you plan your day.
When to go
Mossel Bay can be dived all year. Autumn, around March to May, often brings the calmest settled spells. In summer, easterly winds along the Garden Route can push warm surface water away and bring cold water up from the deep, a process called upwelling, which can drop the temperature by several degrees overnight and turn the water green. Winter brings cold fronts but also some clear, calm days between them. The best time to dive in South Africa guide compares the regions month by month.
Knysna and the Garden Route
Mossel Bay makes an easy base for a Garden Route road trip. About an hour and a half to the east, the Knysna estuary is home to the endangered Knysna seahorse, found in only a few estuaries in South Africa. Further on, the reefs of the Tsitsikamma marine reserve are among the oldest protected waters in Africa.
A day of diving in Mossel Bay
A typical day starts with a check of the wind and swell forecast, then a morning launch from the harbour or a shore dive from the beach while the sea is calm. Most boats do one or two dives and are back by early afternoon, when the wind often picks up. Use the afternoon for a walk along the Point, a visit to the town's maritime museum, which tells the story of Dias's voyage, or a boat trip around Seal Island. If the sea is too rough to dive, the town is a good base for exploring the Garden Route by car, with the forests and lagoons of Wilderness and Knysna within easy reach.
Practical tips
A 5 mm or 7 mm wetsuit covers most of the year, with a hood for winter and for upwelling days; see our guide to South Africa water temperature for diving. If you are new to diving, the sheltered bay is a comfortable place to train; read learn to dive in South Africa for how courses work.
Questions divers ask
Is Mossel Bay good for diving when Cape Town is windy?
Often, yes. Its north-facing bay is sheltered from the big south-westerly swells, so it can be diveable when more exposed coasts are not.
Is the water warmer than in Cape Town?
Usually. Expect roughly 15 to 22 °C, though summer upwelling can bring sudden cold spells.
Can I see seals at Mossel Bay?
Yes. Seal Island in the bay has a Cape fur seal colony, and boat trips around it are common.
