Around the Rocks Challenge

Sighting directly between the distant silhouettes of Table Mountain and Lion's Head, swimmers dive into the crisp Atlantic surf off Big Bay to round its jagged reefs. The Around the Rocks Challenge is an open water swimming race held in the cold sea waters of Big Bay, along the coast of Bloubergstrand near Cape Town in the Western Cape. Recognized as the oldest organized ocean swim in Cape Town, the event is organized by Big Bay Events and challenges participants over an open water distance of approximately 2,500 meters. The course takes competitors on an adventurous loop around the Big Bay rock islands, with organizers fine-tuning the exact circuit on race morning to match the size of the incoming Atlantic swell.

Stepping into the surf, swimmers must carefully line up their initial trajectory, aiming straight between Table Mountain and Lion's Head for the first 100 meters to steer clear of submerged rocks lurking beneath the breakers. Swimmers then bank right around a bright orange turning buoy, riding the sweeping tidal current to carry their stroke toward a second navigational mark. From there, the route cuts back into the bay, threading between jagged outcrops and passing directly alongside the local surfer lineup before swimmers catch the final waves back onto the sandy beach. Water temperatures in Big Bay typically hover between 12 and 15 degrees Celsius, demanding serious mental and physical composure as the Atlantic chill bites into the muscles.

In past editions, swimmers have encountered noticeable thermoclines during the crossing, with water temperatures plunging to around 11.6 degrees around the exposed outer rocks before warming up slightly as the route returns to the sheltered shallows near shore. Once through the surf zone and across the finish line, competitors find immediate comfort gathered together in the courtyard of the local lifesaving club, warming cold hands over steaming cups of hot chocolate and sharing jelly-filled donuts while waiting for the awards.

Robben Island: reefs, seals and shipwreck waters

Robben Island, out in Table Bay, was named after the archaic Dutch word for seals. Surrounded by jagged shorelines and treacherous offshore reefs, the island takes the full brunt of powerful Atlantic swells that roll into the bay, creating a notorious graveyard for navigating vessels. An underwater archaeological survey conducted in 1990 identified no fewer than 24 historical shipwrecks lying submerged around the island, with the vast majority resting in shallow waters less than ten metres deep. Alongside the sunken hulls, the island's marine ecosystem experienced a remarkable revival when African penguins re-established a breeding colony on its shores in 1983, a population that expanded rapidly to peak at approximately 16,000 individuals in 2004.

Guiding vessels past these treacherous shallows has challenged mariners for centuries, long before the construction of permanent navigational towers. The island's highest elevation, Minto Hill, was originally known by Dutch sailors as Vuurberg because lookout fires were lit atop its crest to warn incoming ships of the surrounding hazards. That primitive beacon became the first navigational light south of the equator, relying on wooden scaffolding where pitch rings, open wood fires, coal, and later wax candles were burned through the night. Today, Minto Hill is crowned by the Robben Island Lighthouse, an 18-metre-high cylindrical masonry tower completed in 1865 that remains the only lighthouse in South Africa to flash its beam without rotating, projecting a warning light visible from a distance of 25 kilometres out to sea.

Table Bay: storm waves and the Tavern of the Seas

Table Bay is a broad coastal embayment spanning approximately 100 square kilometres that plunges to a maximum depth of 35 metres at the centre of its mouth. European navigation in these waters began in 1503, when the Portuguese navigator António de Saldanha became the first European explorer to cast anchor within the sheltered natural harbour. Thanks to its role in provisioning trade fleets with fresh supplies midway through grueling voyages, Cape Town earned enduring renown as the Tavern of the Seas. Yet behind Table Bay's inviting anchorage lay lethal oceanic hazards, especially during the stormy winter months when ferocious northwesterly gales drove mountainous seas directly into the bay. Over the seventeenth and eighteenth centuries, countless sailing vessels were ripped from their moorings and driven relentlessly onto the jagged reefs.

Among the most famous casualties was HMS Sceptre, a British warship destroyed by a devastating hurricane on November 5, 1799, after being smashed onto the reef off Woodstock Beach near where the Royal Cape Yacht Club operates today. The maritime peril reached a catastrophic climax during a winter storm in 1858, when thirty vessels were wrecked against the shoreline in a single tempest, accompanied by tragic loss of life. When maritime underwriters at Lloyd's of London responded by refusing to insure ships anchoring in Table Bay during the dangerous winter season, the British Colonial Government was forced to take decisive protective action. Engineering work on the harbour's first permanent breakwater began in 1860, finally providing incoming ships with an engineered sanctuary from the punishing Atlantic storms.

Green Point and Milnerton: lighthouses of Table Bay

In 1926, engineers fitted the Green Point Lighthouse with a powerful foghorn that local Cape Town residents quickly dubbed Moaning Minnie; its luminous beam proved indispensable in July 1966, providing vital illumination during the rescue operation when the S.A. Seafarer ran aground. High above the bay on the slopes of Signal Hill, mariners took additional navigational cues from the Lion Battery, where the historic Noon Gun cannons continue to overlook the water. Originally cast in 1794 as 18-pounder smooth-bore muzzle loaders and mounted at the Imhoff Battery, the guns were once fired to alert residents across the inland valleys whenever transport ships entered the bay.