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Event organiser Amanda Inkster said nearly 60 people had taken part so far, aged from 9 to close to 70 and ranging from complete beginners doing their first multisport event to seasoned New Zealand triathletes.
The distances offered included 800m swim and 3km run, 400m swim and 2km run, and 400m and 800m swim only for adults and teenagers, and a 200m swim and 1km run for under-12 participants.
Competitors could also choose to participate as a team.
''We've been blown away with the support of the community and are really pleased with the numbers so far,'' Ms Inkster said.
''We are particularly pleased that the event is attracting new people to the sport, giving them the chance to have a go at a short course in a fun, relaxed environment.''
One beginner, Hannah Boaler, said the minimal pressure and being able to stop for a rest in the swim if necessary made it ''all the more achievable''.
The weekly events will stop over the Christmas period and restart again on January 11, from when they will run until February 8.