The Sardine Run Route: Where It Starts, Where It Finishes

Where the run starts: the Agulhas Bank

Every sardine in the run begins life on the Agulhas Bank, the wide continental shelf that fans out south of the country between Cape Agulhas and Gqeberha. The Southern African pilchard (Sardinops sagax, in plain terms a sardine up to about 25cm long) spawns there in the southern summer, with a single female releasing up to around 27,500 eggs per spawning. The Bank suits them: cool, productive, plankton-rich water over a shelf broad enough to hold enormous shoals.

So the run does not start with fish suddenly appearing off a beach. It starts months earlier as an unseen build-up of biomass on the Bank. As autumn tips into winter, part of that population gathers and begins pushing east and then north-east along the coast. Researchers read this as a seasonal reproductive movement of a cool-water-adapted fish, and the full explanation of why they do it is its own story. What matters for the route is simple: the starting gun fires off the southern Cape, far from where most people ever see a bait ball.

The cold-water corridor: why the shoals hug the coast

Look at a sea-temperature map of this coast in January and the run seems impossible. The Agulhas Current runs hot, fast and south-west, exactly opposite to where the sardines are headed. In winter, though, the picture changes inshore. Cold counter-currents and pockets of upwelling develop between the main current and the shore, dropping inshore temperatures below the roughly 21 degree ceiling the sardines can tolerate. A corridor of acceptable water opens up, pinned against the land.

The shoals move up inside it. Step outside the corridor and they hit water that is too warm; the Agulhas Current acts as a moving wall on their seaward flank. This is why the run hugs the coast so faithfully, sometimes pushing shoals into the surf zone itself, and it is why the event is so watchable. The fish are not choosing scenery. They are threading a thermal needle.

It also explains the run's biggest uncertainty. In warm winters the corridor forms weakly, late, or barely at all, and the run stalls or fizzles. Water temperature is the single variable every skipper on this coast watches, and it should shape when you book your season dates more than any brochure calendar.

The route, stage by stage

From the Bank, the route reads like a roll call of the Eastern Cape coast. Timings below are the historical pattern; individual years run early, late, strong or thin.

Gqeberha to the Kei: the southern leg

The stretch from Gqeberha past East London is where the run first becomes something you can plan a trip around. PADI's own guidance places the early phase of the run, in May and June, in the waters near Gqeberha and East London before the action shifts north. The shoals here are fresh into the corridor, the common dolphin pods (which can number in the thousands) are assembling, and Cape gannets begin their 30-metre dive-bombing raids that give away shoal positions from kilometres off.

Chintsa sits squarely on this leg, about 40 minutes from King Phalo Airport outside East London, at the point where the run leaves the city coastline behind and commits to the Wild Coast. It is the reason our expeditions run from Chintsa rather than further north: you meet the run early, on a stretch of coast where only a handful of boats operate. The fleet follows the fish north through June. The fish come past here first.

Then comes the Kei River mouth, the historical boundary of the old Transkei and the psychological start of the Wild Coast. North of the Kei the coast empties out. Roads pull inland, settlements thin, and for the sardines the geometry of the seafloor starts to change in a way that defines the second half of the route.

Waterfall Bluff: the gateway where the shelf narrows

Off much of the Eastern Cape the continental shelf gives the shoals room to spread: they can sit deeper, wander a few kilometres offshore within the cold corridor, and pass by unnoticed. Near Waterfall Bluff, the cliff-lined stretch of Pondoland coast close to Mbotyi, that room disappears. The shelf narrows hard, the deep water of the Agulhas Current presses in toward the cliffs, and the cold corridor is pinched into its tightest squeeze on the whole route.

The result is a funnel. Everything moving up the coast, sardines and the predator column behind them, has to pass through a compressed band of water close inshore. Shoals that were dispersed become concentrated. Predators find and herd them faster, and bait balls (typically 10 to 20 metres across, usually gone within ten minutes) form at a rate the wider southern shelf rarely matches. This is the geographic reason Port St Johns and Mbotyi became the run's famous mid-season venues, a story we cover properly in the Port St Johns guide.

It cuts both ways. The funnel concentrates boats as well as fish, and by the time the run reaches Pondoland in late June it has already swum past hundreds of kilometres of quieter coastline to the south. Neither end of the route is "the" sardine run. They are different phases of the same animal event.

Where the run finishes: southern KZN and the Durban question

The traditional finish line is the southern KwaZulu-Natal coast. In the classic pattern, shoals crossed into KZN in late June and reached Durban around the 25th. None of this is new: the run's earliest written reference dates from 1853.

That ending has become the least dependable part of the route. The KZN leg has weakened noticeably since the early 2000s, and in warm years the run effectively finishes on the Wild Coast, never arriving off Durban in force. Warming inshore water is the documented pressure: the further north the shoals push, the harder it is for the cold corridor to hold.

The practical takeaway for a traveller is blunt. Do not plan a sardine run trip around the finish line. KZN search interest is high (people still hunt for "sardine run Durban" every winter), but the reliable action lives further south, on the Eastern Cape leg of the route. Our guide to choosing a viewing base works through that decision town by town.

Reading the route as a traveller

Once you see the run as a moving line rather than a place, trip planning gets simpler. Base yourself early on the route (East London and Chintsa) and you target the May to June phase: fewer operators, an easy flight into King Phalo Airport, and the run arriving rather than departing. Base yourself at the funnel (Port St Johns or Mbotyi) and you target the compressed mid-season phase, sharing it with the bulk of the fleet. Base yourself in KZN and you are betting on the route's least reliable stage.

Whichever leg you choose, the fundamentals stay constant along the whole line: the same dolphins doing the herding, the same Bryde's whales crashing the bait balls, the same gannets falling out of the sky. The route decides when and how concentrated it is, not whether the cast shows up.

Our 2027 expeditions run seven days from Chintsa on the southern leg, timed for the corridor's early phase. Dates and pricing are on the packages page, and the season sells on a first-booked basis.

Frequently asked questions