The Korean Sea,
The More You Know, the Deeper You Fall.
From 36m urban deep pools to the unexpected seas of the East Sea and Jeju.
Meet the true face of Korean diving with NB Divers, 26 years without a single accident.
From the East Sea to Ulleungdo,
every face of the Korean ocean.
Most people don’t know: from the East Sea to Jeju, Korea holds completely different oceans in every season.
Dive sites just 5–30 minutes by boat from the harbor. Artificial reefs (structures placed underwater where fish gather) make the marine life abundant. Every level is possible here, from snorkeling near the surface to deep technical diving.
Drift diving powered by strong currents. Low visibility isn’t a weakness here, it’s the West Sea’s character. The feeling of giving yourself to the current is something no other sea can imitate.
A warm, generous sea. Summer water at 27°C, one thin suit is all you need. Sea turtles, large fish, soft coral colonies, the first place we recommend for anyone entering the ocean for the first time.
The pinnacle of Korean diving. The country’s best year-round temperatures and visibility, and a living subtropical ecosystem. Damselfish, parrot bream, octopus, and with luck, even manta rays. Proof of how deep Korean waters can go.
A volcanic island rising from the middle of the East Sea. Reachable only by boat, which is exactly why its ecosystem remains untouched. 30m+ visibility is the baseline. If you know Korean diving, Ulleungdo is the must-do.
Korea’s most accessible ice diving site. Slip through a hole in the ice, and winter sunlight refracting through the frozen ceiling creates a scene words can’t capture. Every January and February, a world nature opens only in that season.
A valley ice diving site near Baekdamsa Temple, at the foot of Seoraksan. The extra distance buys you clearer water and deeper silence. Snow-covered mountains, then the cold valley water below, the moment you descend, you feel in your whole body that diving is, in the end, entering nature itself.
Visibility 15–25m. Creatures that live only in cold water. Ice diving in midwinter. Clear, transparent water that flounder, octopus, and sea urchins call home.
Drift diving on strong currents. Unique terrain and ecosystem, the low visibility becomes a special experience of its own.
27°C water. Sea turtles, large fish, coral. The warmest, friendliest ecosystem for divers.
30m visibility. Subtropical ecosystem. The peak of Korean diving, ideal temperatures and conditions year-round.
Visibility 35m+. Korea’s clearest water. A pristine ecosystem, bucket-list diving’s holy ground.
Cut a hole through the ice and descend. Winter sunlight pouring through the frozen ceiling is a sight you’ll never forget. 1.5 hours from Seoul.
Pristine valley ice diving at the foot of Seoraksan. Visibility 15m+. Clearer and more remote than Hongcheon.
Creatures of the Korean Sea
East Sea · South Sea · Jeju · Ulleungdo, different ecosystems, different lives











There Is No Season.
Korea dives 365 days a year
and life wakes up
March–May. 12–18°C. Nutrients accumulated over winter are released and marine life stirs into action. Clean visibility and the best time to observe spawning fish.
richest sea
June–August. 22–28°C. Comfortable diving in a thin suit. Biodiversity at its peak, the season we recommend most for beginners.
the golden season
September–November. 16–22°C. The East Sea’s visibility hits its yearly peak. Cool water and crystal views, the season experienced divers love most.
and ice diving
December–February. 3–10°C. In a drysuit, the winter sea is a perfect diving environment. And an experience possible only in Korea, ice diving. A transparent world waits beneath the ice.
An Invitation to the World Beneath the Ice
Every January and February, when Baekdam Valley and the Hongcheon River freeze over, NB Divers explores the world beneath the ice.
We have guided divers from around the world under the ice for 26 years. Safely, joyfully, and never cold.
And not just scuba. Freediving and mermaid experiences are welcome beneath the ice too.


Once the ice forms, spots fill within 24 hours. Leave your email now, and we will contact you the moment the season opens.
One hour from Seoul,
world-class deep pools
Within an hour of Seoul, you can dive world-class deep pools 26–36m deep. Clear visibility, facilities built for training, no ocean required to be overwhelmed. No experience needed; you can start today.

A 26m deep pool designed for freediving (breath-hold diving without equipment) and scuba training. Known for its exceptional visibility and natural light.

A controlled environment with multi-level depth training zones, ideal for PADI course dives and systematic skill development.

A themed pool with unique underwater installations, Korea's most-photographed deep pool, perfect for content creators and anyone wanting a one-of-a-kind experience.
A full day in Korea's deepest indoor pools.
Any program, same price.
More divers, lower price each.
US$67 deposit (KRW 100,000) · Confirmed within 24 hours
Included Transport (Jamsil) · pool entry · gear rental · instructor · insurance
Not included Drysuit +US$34–67 (KRW 50,000–100,000) · meals
Deep Pool Experience Booking
US$67 (KRW 100,000) deposit · Balance on the day
Read the PADI Diver Medical questionnaire before diving.
If every answer is "No": complete it on the day.
If any answer is "Yes": physician approval needed after a medical evaluation for diving.
08:30 Meet at NB Divers (Jamsil) · drive together → 10:00 Arrive · briefing · gear setup → 10:30–13:00 Two deep pool sessions → 13:30 Pack up · depart → Around 15:00 back at Jamsil
Any program, same price. Deposit deducted from the total.
Details — what's included · what to bring · how booking works
Included — Transport (Jamsil) · pool entry · gear · instructor · insurance
Not included — Drysuit +US$34–67 (KRW 50,000–100,000) · meals
Swimsuit · towel · toiletries · certification card · personal gear
1. Pay the US$67 deposit (KRW 100,000). Add your preferred date + contact (phone / KakaoTalk / WhatsApp) in the order notes.
2. Confirmed within 24 hours.
3. Balance on the day. Then we dive.
In the order notes, leave your preferred date and the easiest way to reach you (phone / KakaoTalk / WhatsApp). We reply within 24 hours.
Pay the US$67 Deposit (KRW 100,000) Questions? Ask us on live chatCurious about deep pool schedules? Check right now.
Ask About Deep Pool Dates →We love the Korean sea,
and we show it to the world.
NB Divers doesn't simply operate dives in Korea. We're the team that knows firsthand how special Korean waters are, and shares that with divers every day.
Built since 2000, 26 years of training, equipment, travel, and guiding. Few places offer everything in Korean diving under one roof. That experience keeps you safer, diving longer, and more deeply connected to the sea.
- Founded 2000 · 26 years of Korean diving expertise
- Run by a PADI Course Director, the highest standard of training
- 10,000+ students · not a single accident
- Full programs: East Sea · South Sea · Jeju · Ulleungdo · ice diving
- Training · gear · travel · guiding, one-stop (English available)
Weekday business hours · Reply within 24 hours

Everything you're wondering
before you start, right here.
Anything else, ask us directly on live chat. We reply within 24 hours on weekdays.
What's the difference between a PADI certification and a license?
A certification is the official PADI credential issued at recreational levels, from Open Water through Rescue.
A license applies to professional levels such as Divemaster and Instructor, and grants the authority to work in diving professionally.
NB Divers follows PADI standards exactly and explains clearly what each level means.
Why does NB Divers use precise PADI terminology?
Using PADI's standard terms correctly reflects how seriously we take training. When terms get mixed up, students can't tell exactly where they stand in their education.
It's the mark of a dive center trusted for the quality of its training, not its price, and it starts with a single word.
Can I dive if I can't swim?
Yes. Try-dive experiences are open to everyone regardless of swimming ability. For the PADI Open Water certification, the standard is a 200m swim, or 300m with a snorkel if swimming is difficult. Your instructor is with you from start to finish.
Is there an age limit?
Anyone aged 10 or older can join. Ages 10–14 earn the Junior Open Water certification and dive with an adult guardian. There is no upper age limit, if you have health concerns, talk to us first.
Do I need my own equipment?
No. Mask, fins, suit, BCD (buoyancy vest), and regulator are all provided. Only the drysuit is extra, at $35–$70.
How long does certification take?
For PADI Open Water, theory, pool, and ocean dives, usually 2–3 days. A 1-day intensive course is also possible depending on your schedule. The moment you certify, your card is valid worldwide.
Is it okay to come alone?
Of course. There is always a team at NB Divers, and making first-timers feel at home is part of our job. In fact, most of our regulars first came alone.
Isn't the Korean ocean cold?
Depending on the season, you wear a drysuit or a 5–7mm wetsuit. With the right gear, diving is comfortable even in midwinter. In fact, the marine life and clear visibility you only get in cold water are the real charm of the East Sea.
People who started diving
at NB Divers
"I'd dived plenty before and came in full of confidence, but at NB Divers I'm learning not just to dive well, but to be a good buddy and to lead other divers. This is what real scuba diving is. I can feel I'm learning it properly."
"I did the New Year sunrise dive on January 1, 2025 with the instructors. I was a little scared at first, but meeting great instructors and divers at NB Divers, going from Open Water to Advanced, now I'm a diver whose heart races for the ocean. Even the cold winter sea was warm and safe thanks to the drysuit and the reliable NB team."
"I always thought the East Sea was cold, hard, and difficult. This tour changed my mind. I drove there as excited as a kid the night before a school trip, great place, great people, great gear, great leader. Everything about that day was good, and it lifted my whole mood. East Sea, I love you."
The Korean sea,
experience it yourself
From the East Sea to Jeju, from ice diving to deep pools. 26 years of experience by your side, from your very first moment
Diving is Our Culture.
Weekday business hours · Reply within 24 hours
