Udo Island
A flat island off eastern Jeju with a beach of white coral sand, peanut fields and haenyeo divers working the shallows.
Updated 25 August 2026
Udo - cow island, for its shape - lies a short ferry ride off Jeju's eastern tip and is flat, green and about six square kilometres, which makes it walkable, cyclable and rideable in a day. Its best-known feature is Seobinbaeksa, a beach whose sand is not sand at all but broken white coralline algae, granular and pale, designated a natural monument and unusual enough that taking it is prohibited. Around the island are basalt cliffs at Udobong, the lighthouse park on the low hill, a black-sand beach, stone walls round the fields, and peanut plots - the island's crop, which turns up in peanut ice cream sold everywhere. Haenyeo, the women divers of Jeju, still work here; some of them are elderly and the practice is UNESCO-listed. Scooter rental requires a licence that many visitors do not have, and electric carts and bicycles are the common alternative. It fills with day trippers in summer.
What you'll find
- Seobinbaeksa - the white coral-algae beach.
- The haenyeo - women divers working the shallows.
- Udobong - the low hill, lighthouse and cliffs.
- The peanut fields - the island crop behind stone walls.
When to go
April to June and September to October. Summer brings heavy day-trip traffic. Ferries stop in wind, which strands visitors on the island.
Before you go
Taking the white sand is prohibited and enforced. Scooter hire needs a valid licence - many are turned away. Ferries cancel in wind. The island is crowded in season and quiet outside it.
Nearby
Seongsan Ilchulbong is at the ferry port; Seopjikoji and eastern Jeju are close.
Key facts
Source: Wikidata, item Q496912, read on 18 October 2026.
What to pack for Udo Island
Chosen from what this place is for. Tap a kit for the full checklist.
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Your own mask + snorkel - A well-fitting mask is the single biggest comfort upgrade underwater. Find on Amazon
- Padded shorts - The one thing that makes a full day in the saddle bearable. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
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