The Cowra leg of the Central West Interclub triathlon series was called off on Sunday morning.
Club president Tabatha Jones made the call to postpone the triathlon after rain on Friday and Saturday.
Ms Jones advised visiting clubs of the decision via facebook on Sunday morning stating that the River Park oval precinct was too wet for the event.
The event will now be held on Sunday, January 21.
Triathletes from Mudgee, Bathurst, Orange and Dubbo will take part in the event.