Jeju

Jeju is a volcanic island province off the southern coast of South Korea, surrounded by the cold to temperate waters of the Northwest Pacific. The region is known for its clean seas, volcanic underwater topography, and a mix of rocky reefs and sandy bottoms. Dive centers around Jeju City and the island's coastal towns typically offer boat trips to nearby sites, with visibility commonly ranging from good to moderate and water temperatures that are cooler outside summer months. Common sightings include a variety of temperate reef fishes, octopus, sea urchins, and seasonal pelagic life when conditions allow.