With its colourful coral reefs, ancient shipwrecks and varied marine existence Sri Lanka provides incredible diving. From November to April the southwest coast (Bentota. Hikkaduwa, Unawatuna, and Mirissa) offers the best diving at the same time in the east coast (Trincomalee, Batticaloa) gives the best diving from May to September. The reef sharks of Pigeon Island, and Mirissa’s deep-sea history with whale sharks are all well-preferred dive sites.