
National Sauna Week: wellness with great prizes
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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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The Celestine sauna in the nude area of Thermae Grimbergen is a very dry sauna with a special crystal in the middle
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The Celestine sauna is situated under the restaurant at Thermae Grimbergen. It’s a small cosy sauna with a special stone in the middle of the cabin: a celestite crystal. This crystal has calming properties and promotes a peaceful night’s sleep
With a temperature of about 75°C, this is a very dry sauna, so even sauna novices will be able to tolerate this temperature quite well. The stove is hidden under the benches and there is a cold plunge pool next to the sauna to cool down in.

- Promo - Promo
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!

- Promo - Promo
Visit Thermae Boetfort or Thermae Grimbergen in August and receive an exclusive voucher! This voucher lets you bring someone along to our sauna and wellness centre for free between 1 September and 16 October 2026.

- 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!
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