Diving in Wild Coast

For a few weeks each southern winter, billions of sardines move north up South Africa's Wild Coast in a band of cold water, and everything that eats them follows: dolphins working the shoals into bait balls, sharks, whales, and gannets folding up and hitting the sea like artillery. The Sardine Run is the largest marine feeding event on the planet, and on a good day you are in the water in the middle of it.

You dive or snorkel from a rubber boat in cold, often rough seas, chasing radioed reports of activity that may or may not materialise. Nothing is guaranteed — blank days happen, and honest operators say so upfront — which is exactly what makes the days that deliver so extraordinary.

The window is roughly June and July, the water around seventeen degrees, and the whole spectacle depends on a natural event that varies enormously in timing and intensity from year to year. Go for the chance, not the certainty.

The run's timing and intensity vary hugely year to year. Operators are honest that blank days happen.