Semana da Marinha SOAMAR — São Francisco do Sul

The current tugs at your suit as you navigate the protected channels of the Babitonga Bay, a vast estuarine complex covering over 150 square kilometers. In these calm, greenish waters, you are following the same maritime routes that first opened to European eyes in 1504, when navigator Binot Paulmier de Gonneville anchored his ship, L'Espoir. Tradition tells of a 35-foot wooden cross he erected on a nearby hill to mark his landing—a silent sentinel that has watched over these swimmers for centuries. You are participating in the Semana da Marinha SOAMAR, an annual event in São Francisco do Sul that brings together endurance athletes in a location defined by its rich naval history and ecological depth.

Historical currents and landmarks

While you push through the water, you pass near the Ponta de João Dias, home to the Forte Marechal Luz. Built to guard the northern bay entrance, this historic fortification still commands the shoreline with its 19th-century Armstrong cannons, which occasionally fire in a rhythmic salute that echoes across the water. The bay’s geography is complex: while the main channels average six meters in depth, the connection to the open sea plunges to nearly 30 meters, a stark reminder of the power of these tides. You might occasionally spot a Toninha dolphin surfacing; these small, elusive cetaceans are the pride of the local estuary and are strictly monitored by regional conservation projects.

Race day and local context

This event is organized by the Correr E Nadar circuit, which manages a variety of distances throughout the coastal region of Santa Catarina. If you are looking for more competitive opportunities in the same area, the Travessia de Inverno takes place earlier in the season, offering a different look at the local sea conditions. The bay’s history is further intertwined with the steamship 'Babitonga', a vessel that revolutionized local transit in the late 1880s, connecting the city to Joinville with unprecedented speed. Long before these industrial marvels, the indigenous Carijó people thrived here, shaping a culture that relied on the fertile land and the abundant marine life of the Palmital Canal. As you finish your set, you are swimming through a living archive of colonial expeditions, indigenous heritage, and the evolving maritime legacy of southern Brazil.