Open Water Swimming
Past EventWaikiki Roughwater Swim
About this race
The ocean swim that inspired the Ironman — Sans Souci Beach to Duke Kahanamoku Beach.
Before you line up
Race-day planning
Waikiki Roughwater Swim is held on Monday, September 7, 2026 in Honolulu, HI. Racing begins at 08:00 AM. Registration is presently closed.
Always confirm the date, start time, entry fee and course details on the official event site before you travel or register, as race information can change after a listing is published. For discipline-specific guidance on what to expect and how to prepare, see the Open Water Swimming sector guide.
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