Raiatea and Taha'a are the Society Islands' quieter twin-lagoon answer to Bora Bora. Raiatea brings the logistics, marina life, dive centers, Faaroa River, and the UNESCO-listed Taputapuatea cultural landscape. Taha'a brings motu beaches, vanilla farms, pearl farms, rum distilleries, and the famous Tautau Coral Garden drift snorkel. Underwater, the destination is land-based and local-operator focused: day boats run to the Nordby wreck, Te Ava Piti, Miri Miri, Tiva Pass, Ceran Pass, and sheltered lagoon gardens. It suits divers who like small boats, mixed reef and pass profiles, strong Polynesian culture, and non-diver-friendly excursions. Diving is possible year-round, but May to October is the easiest overall planning window for dry weather, lower humidity, and better topside comfort.