Polish Swimmer Makes History by Crossing the Baltic Sea

Bartlomiej Kubkowski sets a new world record after a 55-hour marathon swim covering 160 kilometers.

By DW Pulse | WARSAW — August 8, 2026 — In a remarkable display of endurance, Polish swimmer Bartlomiej Kubkowski has become the first person to swim across the Baltic Sea. The marathon feat involved navigating 160 kilometers from Sweden to Poland, with the athlete spending over 55 hours in the water.

Key Highlights

• Bartlomiej Kubkowski successfully swam 160 kilometers across the Baltic Sea in a world-first achievement.
• The grueling 55-hour journey was undertaken to raise more than $200,000 for cancer support.
• Throughout the swim, Kubkowski was accompanied by a safety boat providing essential food and water.

A Battle of Endurance

Kubkowski described the historic journey as a “battle between good and evil,” noting that he faced extreme physical exhaustion and hallucinations during the marathon effort. Despite these intense challenges, the swimmer remained focused on the broader goal of his charity initiative.

His efforts have garnered significant international attention, not only for the athleticism displayed but for the substantial financial support raised for cancer research and patient care. The achievement stands as a new benchmark in long-distance maritime swimming, marking a historic success for the Polish athlete.