Thermen Binnenmaas
Thermal baths & spa towns
About
Thermen Binnenmaas is a sauna and wellness resort in the polder near 's-Gravendeel, about half an hour from Rotterdam and Dordrecht. According to the operator it offers twelve saunas and steam baths, a heated indoor and outdoor pool open all year, cold plunge baths, relaxation temples, a garden and an orangery.
There is also a wellness restaurant (Indonesian and bistro cooking, served in your robe) plus massages and other treatments. The saunas are textile-free and entry is from age 16.
- Twelve saunas, five of them outdoors, including the hottest cabin Die Hard (90 °C)
- Heated indoor and outdoor pool all year round
- Aufguss (Löyly ritual) several times a day, according to the operator
- Ladies' day on the first Monday of each month
- Open daily 10:00–22:00, free parking at the entrance
Opening hours
| Daily | 10:00–22:00 |
|---|---|
| Evening entry | 16:00–22:00 |
Closed on 31 December, 1 January and 27 April. The first Monday of each month is ladies' day (except public holidays and school breaks, then it moves a week later); in 2026 e.g. 7 December.
Prices
| Full-day entry (10:00–22:00) | from €41.95 |
|---|---|
| Evening entry (16:00–22:00) | from €31.95 |
| 5-visit pass | €180.00 |
| 10-visit pass | €309.00 |
| 10-visit pass, evening | €239.00 |
| Annual membership | €1,650.00 |
| Rental of slippers, bathrobe or towelsper item | €8.50 |
| Complete bath set | €19.95 |
According to the operator, prices vary by day and how busy it is; current prices are shown when booking. Treatments start at €39.00 and packages including entry at €53.95.
Amenities according to OpenStreetMap
Only what the open data records. What is missing, we do not know.
- Saunayes
What is not listed here is unknown to us or the operator has not said.
Pros and cons
Pros
- Twelve saunas at different temperatures, including outdoor ones
- Heated indoor and outdoor pool all year
- Aufguss several times a day
- Wellness restaurant with vegetarian and vegan choices
- Free parking at the entrance, close to the A29
Things to keep in mind
- Entry from 16; 16 to 18-year-olds need an adult
- Saunas are textile-free, which may not suit everyone
- Phones and tablets are not allowed in the sauna and relaxation areas
- The fifth outdoor sauna, Fremo, is wood-fired only at weekends
Who it suits and how it works
Who it suits
- a full day of rest away from the crowds
- textile-free sauna
- a couple or group of friends
- ladies' day
Rules and good to know
- Entry from 16; 16 to 18-year-olds must be accompanied by an adult
- Saunas and baths are textile-free; outside the cabins you wear a robe or towel
- Bring a bathrobe, two towels and slippers, or rent them
- Phones and tablets must be put away in the sauna and relaxation areas
- Treatments and packages are booked in advance; treatments can be cancelled free of charge up to 24 hours before
- In pregnancy the operator advises consulting a midwife or doctor
Getting there
Strijenseweg 109, 's-Gravendeel; a few minutes by car from the A29, about half an hour from Rotterdam and Dordrecht
Free parking on site, right at the entrance
Contact
- Address
- Strijenseweg 109, 3295 KN 's-Gravendeel
- Phone
- 078 673 78 48
- [email protected]
Details from the operator's own site, as of 4 Nov 2026. Check them with the operator before you go: thermenbinnenmaas.nl
Data source: OpenStreetMap contributors (ODbL licence)
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