Depends where you are in Tahiti, never been there but they have some of the most powerful waves in the world at Tahiti's Teahupo'o. These waves are generated in the Southern Ocean I believe
Huahine and Tahiti. In both cases there were reefs that kept it calm at the beach. But twice I approached a pass on Huahine, once in a kayak and once in a 40' boat. The waves coming in through the pass were like buildings rolling in. Two surboarders looked like action figures they were so dwarfed by the waves. They also sounded like jets taking off when they broke.