Shorelines shut for Wintertime, no less than for swimming. Similar to in the rest of Korea, from September to May possibly you are not permitted to swim at seashores in Jeju, though it is possible to certainly continue to wander along the them and just take pics. The Jeju Folks https://felix21gt6.kylieblog.com/33642417/jejudo-island-tourism-제주도룸싸롱-an-overview