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Thermal baths in Maarssen

Maarssen stretches along the river Vecht, about 7 km north-west of the city of Utrecht. Thermen Maarssen lies on the Maarsseveense Plassen, lakes on the edge of town, with a sauna built out over the water and steps from its own beach into the lake. Kasteel de Haar, about 7 km south-west, opens its castle and a park of gardens, ponds and avenues to visitors.

  • Baths1
  • Water37°
  • Hot rooms95°
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Baths in Maarssen compared

Entry, swimwear rules, age limits and ticket type, side by side.

BathEntrySwimwear and rulesAgeTickets
1Thermen MaarssenMaarssen
  • Entree (09.00 tot 23.00) (entry, 09:00 to 23:00)€50
  • Entree avond (vanaf 16:00 uur) (evening entry, from 16:00)€40
Textile-free every day: "Het dragen van badkleding is niet toegestaan" (swimwear is not allowed), and the operator says it has no swimwear days. Bathrobe required in the rest rooms, restaurant and on the terrace. Phones only in the reception area; no photos or filming. Silence in the saunas.12+Timed slots, book ahead

Every bath in Maarssen

Open all year unless the hours say otherwise.

  1. 1Thermen Maarssen

    Spa bath, Maarssen · Booking with a fixed arrival and departure time is required; textile-free every day

    The former SpaSereen on the Maarsseveense Plassen, now part of Thermen Resorts, with a sauna built out on the water and steps from the resort's own beach straight into the lake.

    Sauna includedSteam room included

    Hot rooms40 to 95°Water37°€50As of Oct 2026