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Physical ID card required. No ID = no entry. Read more（https://www.thermae.com/en/blog-thermae-grimbergen/141263/general/enjoy-a-carefree-wellness-experience-even-on-our-busiest）
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You can't book an entrance to the spa in advance. You can book a massage/overnight stay/...
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Wellness
Unwind in the green outskirts of Brussels
Welcome to Thermae Grimbergen. Where your body relaxes and your minds calms. Always at your pace. You can enjoy relaxing wellness at our centre seven days a week, in swimwear or naked, whichever is more comfortable to you. No pressure. No rush.
We have been operating as a friendly family business for almost 30 years now and it clearly shows. In our warm welcome. In our meticulous attention to detail. Every visit is a wonderful wellness experience.
Practical info
Our opening hours
From Sunday to Thursday, we are open from 10:30 to 23:00.
On Fridays and Saturdays, we are open from 10:30 to midnight.
Please note that during the Christmas holidays, our usual opening hours apply, except on the following dates:
24 and 31 December 2026: 10.30 am – 5 pm.
25 December 2026 and 1 January 2027: closed.
Our entrance fees
Access to the thermal baths from Monday to Friday €35,90
Access to the thermal baths on weekends (including public holidays and long weekends) €38,90
Forgot to bring a bathrobe or towel? No problem! You can rent or buy all the practical necessities for a relaxing day in the sauna at our reception.
Towel rental 4 euros
Bathrobe rental 7 euros
Slippers 4 euros
Swimwear 7.5 euros
Buy swim trunks 11 euros
Buy slippers 7 euros
Buy a hammam towel 9.90 euros
Booking required?
You can visit our public baths every day, no booking required but there are a few exceptions:
Third-party gift voucher: do you have a voucher from a third party? Please book in advance. You can do so by calling us on +32 2 270 81 96 or by filling in the contact form（https://www.thermae.com/en/contact-thermae-grimbergen） on our website.
Day pass: do you have a day pass? This is valid from Monday to Friday inclusive, except on public holidays, during long weekends and school holidays. Check your pass for the exact terms and conditions. You can’t book in advance to use your day pass.
Group visit: are you visiting us with a group of five or more people? In that case, we kindly ask you to make a reservation by email at least one week in advance (planninggrimbergen@thermae.com). If this has not been done, access may be refused.
Make sure to bring your identity card . We scan this when you check in. Anyone who refuses to present their ID card for scanning may be refused entry to our wellness centre.
Children welcome?
Children are welcome from the age of ten, provided they are accompanied by a parent or guardian. On arrival, we will ask you to sign a declaration. Your child must present valid proof of age. This can be a Kids-ID, passport or birth certificate. No valid proof of age? Regrettably, we will have to refuse entry.
Our saunas and wellness facilities
Ten different saunas,
several heated swimming pools,
a natural swimming lake,
various steam baths, including one with a unique champagne bath,
a floatation pool,
three Jacuzzis,
a special relaxation bath,
and a wide range of other wellness facilities.
Good to know
Our swimwear and nude wellness areas are separate, but all guests share the same changing area.