Australia’s home for marathon and long distance swimming since 1973

Marathon Swimming Australia (MSA) is the nation’s leading authority for marathon and long-distance swimming.

Since 1973, we have celebrated the courage, resilience, and achievements of swimmers who take on the world’s most challenging waters.

We exist to certify swims, support swimmers with mentorship and resources, preserve the history of open water swimming, and advocate for safety, integrity, and environmental stewardship.