The event
A premium open-water swim through the heart of London.
Swim London is a new tide-assisted Thames swim, bringing together elite-level standards, capable participation and a cleaner-river mission.
Sunday 6 September 2026
A single race day on the tidal Thames, with the river working in your favour.
Thames, west London
Proposed corridor between Brentford and Putney. Final route subject to PLA approval.
Capable swimmers
Built for experienced open-water swimmers and triathletes. Full entry standards published before launch.
Properly operated
PLA-engaged, professionally planned and water-quality aware. Safety underwrites everything.
What it is
A serious river swim, designed responsibly.
Swim London is built around the strengths of the Thames — its scale, its history and its tide. We are designing the event to make a meaningful swim possible without compromising safety, permissions or river stakeholders.
Who it’s for
Experienced open-water swimmers and triathletes.
Swim London is not an introduction to open-water swimming. It is a landmark London distance for capable athletes who already train in open water and want a worthy challenge in the capital.