The decision framework is POOL FAILOVER VALUE. The hotel has several water facilities, but they do not fail for the same reasons. Garden Pool, heated Infinity Pool/Jacuzzi and Indoor Pool each have different operating windows and closure risks. The premium only works when at least one useful layer survives your actual date, weather and arrival time.
Four pool states that matter
- Clear daytime: outdoor options create real choice and the multi-pool setup has value.
- Rain or unstable outdoor weather: Indoor Pool becomes the key backup.
- Indoor-Pool monthly closure: the backup chain weakens sharply if outdoor conditions are poor too.
- Arriving after 20:00: pool value should be close to zero and the room itself must justify the rate.
Three pools are not three times the value
Do not price every facility at full value. A pool you cannot use because of weather, closure or arrival time should contribute nothing to the room premium. The useful comparison is how resilient the hotel remains when one layer disappears.
The Indoor Pool matters most on a bad-weather trip
The source records the Indoor Pool as the main weather fallback, but also notes a regular closure on the first Monday of each month. “Indoor” does not mean guaranteed every day of the year. If swimming is a hard requirement, check the calendar before paying.
Late return can erase the entire pool premium
If you return around 20:30 after sightseeing and dinner, the hotel may still look like a strong pool property on the booking page, but very little usable water time remains. In that case compare the room, view, breakfast and coastal location as if the pool premium were zero.
The coastal base is different from a walk-everywhere Seogwipo-city base
The Grand Sumorum works best when you want the Beophwan coast, Olle 7 and a hotel that still has something to do after you return. It is less suitable when your priority is walking to Seogwipo Maeil Olle Market and solving every dinner on foot. If that is your priority, compare where to stay in Seogwipo.
Compare exact-property contracts only
Booking.com — The Grand Sumorum
Fix dates, party size, exact room, view, breakfast, cancellation and your real pool-use pattern before comparing the final tax-inclusive total.
Final decision
Choose The Grand Sumorum more readily when you will return to the hotel in the afternoon, swimming is a real requirement and you value having a backup pool option if weather changes. Do not pay a large pool premium when you will arrive late, never swim or need a more walkable city-center base.