In brief
- A historic pioneering thalassotherapy centre developed at Thermes Marins de Saint-Malo since 1963.
- The exclusive Aquatonic circuit combining 194 massaging jets and 14 workshops in heated seawater.
- A high-end residential offer led by the prestigious 5-star Grand Hôtel des Thermes.
- Therapeutic benefits and stress reduction scientifically proven after just 4 days of treatments.
Thermes Marins de Saint-Malo, a prestigious thalassotherapy centre founded in 1963 in Brittany, offers a rejuvenating experience facing the ocean. This renowned establishment is housed within a monument of elegance: the former Grand Hôtel de Paramé. Built in 1875 by the architect Alexandre Leroyer to welcome the European aristocracy, this seaside palace found its modern destiny thanks to Doctor Pierre Héger. By converting the historic structure into a cutting-edge thermal centre, the physician initiated unique protocols celebrating the curative virtues of seawater and the Breton marine climate. Today, the site combines this rich historical heritage with state-of-the-art care technologies to guarantee treatments with lasting physical and psychological benefits.
Sleeping facing the open sea: from the palace to private residences
Grand Hôtel des Thermes, a 5-star historic setting
Grand Hôtel des Thermes, an emblematic five-star establishment in the resort, features 177 rooms and suites and direct indoor access to the thalassotherapy centre and the Aquatonic area. To fully experience this marine immersion, choosing a Grand Large category room is a must. These luxury settings open onto vast bow windows suspended above Sillon beach, offering the changing spectacle of high tides and the soothing murmur of the surf.
For family stays or those requiring greater independence, other high-end residential solutions are available nearby. Hôtel Antinéa, a three-star partner establishment, offers excellent comfort on the pedestrian promenade with rooms enjoying breathtaking views of the beach. The residences at Villa des Thermes, Neptunia, and Reine Marine (four stars) house fully equipped studios and apartments, some of which benefit from direct access to the beach or treatment facilities.
Practical information: Grand Hôtel des Thermes: Grand Large double room with sea view
Practical information: BRGrand Hôtel des Thermes: « Grand Large » double room with sea view and access to the Aquatonic area included, from €489 per night.BRHôtel Antinéa: overnight stay in a sea-view double room from €163; package at €249 including access for two people to the Aquatonic.BRRésidence Neptunia: from €134 per night, accommodation only.
The Aquatonic circuit: a patented regenerating immersion
The Aquatonic circuit, an exclusive regenerating experience
A true technical and therapeutic feat patented in 1987, the Aquatonic circuit represents a major highlight during a getaway to Saint-Malo. This vast aquatic labyrinth uses heated seawater to deliver a full-body massage through a route of fourteen dynamic workshops. Fully renovated in 2015, the area now offers 194 underwater jets judiciously positioned to relieve muscle tension, stimulate blood circulation, and tone the skin.
As guests progress through the walking corridors, they enjoy geysers, swan-neck showers, bubbling beds, and dynamic jet nozzles. Accessible independently of a full treatment programme, this experience offers an excellent alternative for discovering the benefits of thalassotherapy during a short stay. Guests emerge relaxed, enjoying an immediate feeling of lightness and deeply remineralised skin.
Practical information: Grand Hôtel des Thermes Aquatonic circuit: admission priced at €42
Practical information: BRAquatonic circuit at Grand Hôtel des Thermes: admission priced at €42, including access to the sauna, steam room, and ice fountain (accessible from 6 years old).
Thermes Marins de Saint-Malo: bespoke cutting-edge treatments
The excellence of thalassotherapy care
The excellence of thalassotherapy in Saint-Malo revolves around four major signature treatments: Biocéalgues seaweed wraps, affusion massages, marine drainage, and underwater hydromassage showers. Biocéalgues seaweed cream wraps sit alongside affusion massages, marine drainage, and underwater hydromassage showers. The therapeutic efficacy of these protocols was scientifically demonstrated in a joint study with the Biomedical Research Institute of the Armed Forces (IRBA) and Paris Descartes University. The findings reveal a 70% reduction in fatigue, a 31% drop in stress levels, and a 27% improvement in sleep quality after just three nights of treatment.
To meet modern schedule constraints, the establishment offers four-day Évasion programmes. The Évasion Bien-Être package combines twelve thalassotherapy treatments (including two seaweed wraps and six hydrotherapy treatments), two spa treatments, as well as supervised sports sessions and aquatic activities. Other thematic variations, such as Mother & Baby, Health Capital, or Leg Care stays, address specific goals. The offer for the year 2026 also includes new long-duration programmes: « Sea and Positive Menopause » and « Sea and Harmony Detox ».
Practical information: Évasion Bien-Être Stay: from €1,808 per person
Practical information: BRÉvasion Bien-Être Stay: from €1,808 per person for a stay of 4 nights and 4 days of treatments at Grand Hôtel des Thermes, in a double room on a half-board basis.BRLong-term treatment « Sea and Harmony Detox »: including 20 to 21 treatments and activities spread over 6 days and 7 nights, from €1,311 per person in a double room.
La Verrière and Le Cap Horn: a doubly inspired dining experience
Refined gastronomy with marine accents
The art of living at Thermes Marins also encompasses top-tier gastronomy, overseen by chef Daniel Le Guénan. Restaurant La Verrière offers an ingenious menu combining traditional haute gastronomie with high-level nutrition. Set against a Belle Époque decor adorned with vertical gardens, the chef partners with pastry chef Sylvain Dahirel to craft light and gourmet dishes, featuring more than twenty options containing under 350 calories. Seafood, fine fish, and local shellfish are sublimated daily.
Meanwhile, restaurant Le Cap Horn unveils a refined setting with immense floor-to-ceiling windows overlooking the Saint-Malo beach. Guests can savour iconic house specialities here, such as the famous warm oysters prepared in a sabayon. During the summer season, La Terrasse transforms into an elegant outdoor wooden pontoon, ideal for enjoying sea-infused dishes facing the spectacle of the waves.
Sillon beach: an invigorating getaway at the gates of history
A stay at Thermes Marins offers the dream opportunity to explore a preserved natural environment. Sillon beach, a famous stretch of fine sand connecting the Paramé district to the historic ramparts of the corsair city, offers a spectacular promenade. The sea air along this Breton coast, particularly rich in negative ions and micro-particles of algae, acts as a genuine regulator for the nervous and respiratory systems.
This historic walk allows guests to reach the ramparts of Saint-Malo Intra-Muros directly on foot. Guests of the thalassotherapy centre can thus link the beneficial discipline of thermal treatments with the cultural discovery of the corsair city, its granite bastions, and its picturesque, history-steeped streets.
