What are the Seijaku opening hours?

The wellbeing area is open daily from 10:30–19:30. The separate gym is available 24 hours.

Is Seijaku included for hotel guests?

Yes. Hotel guests use the wellness facilities without an additional facility charge during Seijaku hours; massages and add-ons are separate.

Can children use the wellness area?

No child-use window is published. Official etiquette and terms restrict Seijaku access to guests aged 16 and over.

Can an outside guest use Seijaku?

Official pages conflict: the main page invites outside guests to an experience with access, while etiquette reserves the area for hotel guests. Confirm directly.

Does the hotel have a swimming pool?

No conventional swimming pool is published. Seijaku has an outdoor rooftop cold-water plunge pool with a Basel view.

What should guests wear in the sauna?

The terms conflict: one clause permits swimwear throughout wellness, while the next calls the sauna textile-free. Ask staff for the current area-specific rule.

How long is the Ki massage?

The individual Ki card states 25, 50 or 80 minutes, overriding the broader index language that generalizes base massages differently.

What is the Ichigo Ichie treatment?

It is named as a separate 25-, 60- or 90-minute treatment, but its current card duplicates Ki’s description. No distinct effect is reliably published.

Can a supplementary treatment be booked alone?

No. Each of the five 30-minute supplementary treatments is available only together with a base treatment.

What is the treatment cancellation rule?

Cancellation is free through 24 hours before. Later cancellation or no-show is charged in full, and late arrival can shorten the treatment.

Ultra-LuxuryCity

Basel, Switzerland

13 current Blumenrain 8 categories plus seven Blumenrain 2 keys

Opened 1844

Amadeus Merian

Basel, Switzerland

Spa & Wellness

Grand Hotel Les Trois Rois Spa & Wellness

Name: Grand Hotel Les Trois Rois
Address: Basel, Switzerland

Seijaku Wellbeing occupies Blumenrain 2 and is open daily from 10:30–19:30; the gym is open 24 hours. Hotel guests receive complimentary use of the wellness area during Seijaku hours, while massages and supplementary treatments are separately booked services. Shared facilities include a 90°C sauna, 65°C bio-sauna, steam room, rooftop cold-water plunge pool, relaxation room, fireplace lounge and gym. Access is 16+. The main page invites outside guests to an experience with wellness access, while the etiquette page says the area is reserved exclusively for hotel guests; outside access therefore requires direct confirmation. The clothing terms also conflict, allowing swimwear throughout one clause and calling the sauna textile-free in the next. Three base-treatment cards and five add-ons are published. The Ichigo Ichie card duplicates Ki’s treatment copy, so no distinct effect is invented.

Seijaku daily 10:30–19:30; gym 24 hoursWellness facilities are complimentary for hotel guests during Seijaku hours and restricted to ages 16 and over; official pages conflict on outside-guest access

Facilities

90°C sauna with essential oils
65°C bio-sauna with humidity and essential oils
Steam room with herbal and essential-oil aromas
Outdoor rooftop cold-water plunge pool with Basel view
Relaxation room
Fireplace lounge with panoramic views, tea and light refreshments
24-hour gym with Technogym machines

Signature Treatment

Choose among Yasuragi relaxation massage, Ki vitality massage and the separately named Ichigo Ichie treatment; the Ichigo Ichie card currently repeats Ki’s description rather than publishing a distinct ritual.

Grand Hotel Les Trois Rois spa FAQ

What are the Seijaku opening hours?: The wellbeing area is open daily from 10:30–19:30. The separate gym is available 24 hours.
Is Seijaku included for hotel guests?: Yes. Hotel guests use the wellness facilities without an additional facility charge during Seijaku hours; massages and add-ons are separate.
Can children use the wellness area?: No child-use window is published. Official etiquette and terms restrict Seijaku access to guests aged 16 and over.
Can an outside guest use Seijaku?: Official pages conflict: the main page invites outside guests to an experience with access, while etiquette reserves the area for hotel guests. Confirm directly.
Does the hotel have a swimming pool?: No conventional swimming pool is published. Seijaku has an outdoor rooftop cold-water plunge pool with a Basel view.
What should guests wear in the sauna?: The terms conflict: one clause permits swimwear throughout wellness, while the next calls the sauna textile-free. Ask staff for the current area-specific rule.
How long is the Ki massage?: The individual Ki card states 25, 50 or 80 minutes, overriding the broader index language that generalizes base massages differently.
What is the Ichigo Ichie treatment?: It is named as a separate 25-, 60- or 90-minute treatment, but its current card duplicates Ki’s description. No distinct effect is reliably published.
Can a supplementary treatment be booked alone?: No. Each of the five 30-minute supplementary treatments is available only together with a base treatment.
What is the treatment cancellation rule?: Cancellation is free through 24 hours before. Later cancellation or no-show is charged in full, and late arrival can shorten the treatment.

Reviewed by Hotel Flock · Last updated August 2026