What is Aufguss?
- Aufguss - Aufguss
Heat and scent come together in one intense wellness moment. But what exactly is an Aufguss session? Find out how our sauna masters prepare this sauna ritual and how these sessions affect you!
From Monday 14 to Friday 18 September 2026, the Belgian Sauna Association is organising National Sauna Week. And of course, Thermae Boetfort and Thermae Grimbergen are taking part too!
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For five days, discover just how good it feels to switch off. By visiting our public baths, you will also have the chance to win some wonderful prizes. The perfect moment to treat yourself to a blissful break.
What can you win?
- A Nordic wellness holiday worth €1,250. A unique opportunity to discover Scandinavia. You will receive a travel voucher that allows you to book a special trip with Nordic, the Scandinavian travel specialist.
- €30,000 worth of sauna prizes, in the form of free admission to the various participating centres. This means you may visit us but win admission to another centre.
How to take part
Taking part is very easy.
- Visit us between 14 and 18 September 2026. You can come with a regular admission ticket, your multi-visit pass or as part of another promotion.
- At the end of your visit, scan the QR code at reception. You can then complete the entry form. By taking part, you subscribe to our newsletter and to the newsletter of the Belgian Sauna Association. The winners will be contacted personally.
- Each person may only enter once, regardless of how many times they visit.
- You must be at least 18 years old to take part.
- You can find the full competition terms and conditions on the Belgian Sauna Association’s website.
Discover Thermae Boetfort or Thermae Grimbergen
Whether you choose the historic castle estate of Thermae Boetfort or the green oasis of calm at Thermae Grimbergen, you can enjoy a complete wellness experience during National Sauna Week.
Both centres are open every day, with areas where you can relax in swimwear as well as areas where you can enjoy the facilities nude. This allows you to experience your wellness day in the way that suits you best.
Take your time to try the different saunas, join one of the many unique experiences we organise every day or simply enjoy doing absolutely nothing.
Treat yourself during National Sauna Week. Who knows, you may become the lucky winner of a spectacular wellness holiday or one of the other wonderful prizes.
We look forward to welcoming you!
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