Let the weather edit the itinerary.
Choose one region for the day. These four chapters are alternatives, not a single timed circuit around the island.
Seongsan성산
Arrive early enough to watch the light find the volcanic rim. If clouds erase the summit, the coast below still gives the morning a shape. The island rarely offers only one reason to stop.
An Oreum오름
Choose one of Jeju’s small volcanic cones and walk it without treating the top as a deadline. Grass, stone, and wind change the view long before the path reaches its highest point.
Seogwipo서귀포
The south gathers waterfalls, markets, harbour edges, and slower streets. Pick a compact radius, then let lunch and weather decide which direction remains possible.
Aewol애월
Meet the last light on the western coast, but step away from the busiest viewpoint. A stone wall, a quiet lane, and a smaller patch of water can hold the evening just as well.