Udo Island Submarine

Must Do Experiences

• Descend 30 meters below the surface in a pressurized submarine with panoramic acrylic windows

• Ride the scenic boat transfer from Udo's harbor while spotting Seongsan Ilchulbong Peak from the water

• Listen to the marine biologist's live commentary about Jeju's unique underwater ecosystem

• Capture unforgettable photos of reef sharks, sea turtles, and coral gardens through the submarine's large viewing ports

Hidden Gems

• The early morning departures offer the clearest water visibility and fewer crowds

• The submarine's lower deck provides the best angles for photographing deep-water species

• During summer months, manta rays occasionally glide past the viewing windows on the western route

• The boat transfer route passes hidden sea caves that are invisible from land

What Makes it Special

• Jeju's submarine tours operate in some of Korea's most biodiverse marine waters, home to over 400 fish species

• The vessel combines a scenic surface cruise with a full underwater expedition in one seamless experience

• No diving certification, swimming ability, or special equipment is required—ideal for families and first-time ocean explorers

Perfect Timing

When to visit for the best experience

Visit between May and October for the warmest water temperatures and highest visibility, which can exceed 20 meters. Weekday mornings during shoulder seasons like April and November offer the best combination of clear waters and smaller crowds.

Photography Guide

Capture the perfect shots

• Use a camera with a wide-angle lens and disable flash to avoid disturbing marine life and reducing visibility

• The curved acrylic windows can cause glare—position yourself at an angle and use a polarizing filter if available

• Capture both the underwater scenes and the dramatic coastal views during the boat transfer for a complete visual story

Cultural Etiquette

Respect local customs and traditions

Koreans place great importance on environmental stewardship, so respect the no-touch policy with marine life as a sign of appreciation for local conservation efforts It is customary to thank the crew and guides for their expertise—a simple '감사합니다' (gam-sa-ham-ni-da) goes a long way Dress modestly and remove shoes when boarding if requested, as a sign of respect in Korean cultural settings

Special Events & Experiences

Enhanced experiences and seasonal highlights

• Summer marine education programs offer guided talks on coral reef conservation for school groups and families

• Annual Jeju Marine Festival in September features special submarine tours combined with beach activities and local food markets

• Winter expeditions occasionally spot migrating whale sharks and other rare species during colder water surveys

Important Guidelines & Safety

Essential safety information and guidelines

• Follow all crew instructions during boarding and disembarking, and secure loose items before the submarine descends

• Inform staff of any medical conditions, especially ear or heart issues, as pressure changes can affect sensitive passengers

• Children and elderly visitors should be supervised at all times, and those with severe claustrophobia should consult the tour operator beforehand