September break this year runs from 10SEP-09OCT with each state staggering 2 weeks each over those times - not every state takes the same 2 weeks. NZ has 24SEP-09OCT which is the same as NSW break.
Tahiti is not one of those school break vacation spots, however. It's more the Hawaii, Fiji, Bali, Cairns, Gold Coast type destinations that seem to be popular. Coming out of winter, it's the warmer "fun in the sun" type of destinations.