Uoleva is a sand-cay island in Lifuka district, in the Ha'apai islands of Tonga. Almost uninhabited, it is known for its five small resorts and clean, quiet beaches. Uoleva is known for its five small resorts: Tiana's, Captain Cook's, Sea Change Eco Retreat, Fanifo Lofa, and Serenity Beach. They are each capable of hosting perhaps two dozen guests each, but atteā¦Uoleva is a sand-cay island in Lifuka district, in the Ha'apai islands of Tonga. Almost uninhabited, it is known for its five small resorts and clean, quiet beaches. Uoleva is known for its five small resorts: Tiana's, Captain Cook's, Sea Change Eco Retreat, Fanifo Lofa, and Serenity Beach. They are each capable of hosting perhaps two dozen guests each, but attendance is usually lower. Each is located on the west, leeward side of the island.