Tenrou Island (天狼島 Tenrō Jima) is the holy ground of the Fairy Tail guild. S-Class Mage Promotion Trial are held on this island.

Tenrou Island, known for its hot, summer climate, is located far from the mainland. Cana Alberona noted that because of the clashing currents that are present in the area, Tenrou Island is unaffected by other climates and weather systems, which keeps the temperature high all year long.

The Great Tenrou Tree sinking its roots in the center of the island bestows divine protection upon those bearing the Fairy Tail crest, making it so that they cannot die while on the island, while at the same time enhancing their Magic Power. Such effects would be nullified in the unlikely case that the tree was destroyed.