Udo is a small island a 15-minute ferry off Jeju's east coast, and it's the island's best half-day trip: flat, scenic, and perfect for a slow loop past turquoise coves, a black-sand beach and low stone walls. You come over from near Seongsan, spend a few hours circling it by bike, scooter or the island bus, eat peanut ice cream, and ferry back. Simple, and one of the nicest easy days in Korea.
Getting to Udo
Ferries run frequently from Seongsan Port on Jeju's east coast, and the crossing takes about 15 minutes. As of 2026, buy the round-trip ferry ticket at the terminal (bring ID; foreign passport works). Ferries stop running in the late afternoon and pause in rough weather, so check the last-boat time when you arrive and don't cut it fine.
Note that rental cars generally can't be taken over unless you meet accessibility exceptions, which is fine — Udo is made for two wheels or your feet.
How to get around the island
Udo is small (about 6 km around) and flat, so pick your pace:
- Bicycle — the classic, most rewarding way; the coastal loop is easy and you stop wherever you like.
- Electric scooter / mini electric car — rentable near the pier if you'd rather not pedal; you'll need an international driving permit for scooters.
- Udo shuttle bus — hops between the main sights if you want zero effort.
What to see
- Seobinbaeksa Beach — a rare beach of white coral fragments, blindingly bright against turquoise water.
- Geommeolle (Black Sand) Beach — dark volcanic sand under a cliff, the moody counterpoint.
- Udo Bongdae / Udobong — the island's little peak, a short walk up for a full-island view and the old lighthouse.
- Hagosudong Beach — the main swimming and hangout beach in summer.
What to eat
Udo runs on peanuts, grown right on the island:
- Peanut ice cream (땅콩 아이스크림) — the obligatory Udo treat, sold all along the loop.
- Peanut makgeolli — the local rice wine, nutty and easy.
- Haenyeo seafood — the free-diving women sell fresh conch, sea urchin and abalone near the shore; this is real Jeju food culture.
Go early. Udo is beautiful and no secret, so the first ferries over beat both the heat and the day-tripper crowd — and you'll want the light for the beaches anyway.
When to go
Spring through autumn is ideal; summer is busiest and best for swimming. Winter is quiet and can be windy, with reduced ferries. Any clear day rewards the ride.
How to do it
- Base near Seongsan the night before, or come early from elsewhere on Jeju.
- Take an early ferry from Seongsan Port and note the last return time.
- Rent a bike (or scooter) at the pier and ride the coastal loop.
- Hit the white-coral and black-sand beaches and walk up Udobong.
- Eat peanut ice cream, and catch a fresh-seafood snack from the haenyeo before you ferry back.
Sorting your Jeju transport and any island activities in advance keeps the day loose and the ferry timing stress-free.
Keep it simple: early ferry, a bike, both beaches and an ice cream. Udo doesn't need a plan much bigger than that, and that's exactly why it's such a good day.