Santa Maria is the Azores' southern outpost, a small, sunny island where blue-water boat dives meet quiet beaches and volcanic viewpoints. Divers base around Vila do Porto for local reefs and caves, then watch the forecast for offshore days to the Formigas Islets and Banco Dollabarat, two marquee marine reserves known for strong currents, big visibility, and pelagic life. Across the Azores, summer (roughly June to September/October) brings sunnier days and clearer water, and visibility can exceed 30 m in late summer. On land, Santa Maria is about easy road trips: Praia Formosa for sand, Sao Lourenco bay viewpoints, Barreiro da Faneca's red soils, and short hikes to Pico Alto. Expect an Atlantic environment with swell and changing weather. Build flexibility into your schedule, dive with local operators, and follow the Azores diving code of conduct: control buoyancy, do not touch or collect, and leave nothing behind.