Grand Hôtel des Thermes
Classic Belle Époque grandeur with a serious wellness focus. Stone-and-metal façade, hardwood furniture, rich blues and browns in the rooms. More spa retreat than boutique hotel — most guests are here for thalasso packages.
Hotel guests get a preferential rate on the Aquatonic circuit — ask at reception when checking in.
Why It Matters
Direct beachfront access with no road between the hotel and the sand is rare in France. The in-house Thermes Marins de Saint-Malo is France's top-ranked thalassotherapy center, with 6 seawater pools including the signature Aquatonic circuit — 14 hydrotherapy stations in one heated seawater course.
Built in 1881 as Brittany's answer to the grand seaside hotels of the Belle Époque, the Grand Hôtel des Thermes sits directly on the Grande Plage du Sillon in Saint-Malo — no promenade between you and the sand, just a terrace and the beach. It's a proper 177-room, 5-star hotel with a full thalassotherapy center attached (the Thermes Marins, billed as France's number one), three restaurants, and a piano bar. The walled corsair city is a 20–30 minute walk along the beach, so it's not ideal if you want to be in the thick of Saint-Malo's intra-muros.
Where You'll Stay
8 room types available
Croisière Grand Large
32m² with proper sea views and hardwood furniture in light beige and dark brown. Bathroom with bath and WC. Baby cot or connecting room are options. A comfortable mid-tier choice for couples wanting sea views without paying suite prices.
Extra-large double or twin · 32 sqmCroisière Prestige
38m² with sea views and a lounge area. Rich brown and beige décor. Bathroom with bath, shower, and WC — the full setup. Deluxe amenities include a Nespresso machine and Bluetooth speakers, which the standard rooms don't have.
Extra-large double or twin · 38 sqmCroisière Salon
The largest of the Croisière rooms at 40m². Magnificent sea views, an ornate lounge area in chic blues and browns, and a bath and WC. Extra bed or baby cot possible. Good for those wanting a sitting area without going full suite.
Extra-large double or twin · 40 sqmEscale Supérieure Mer ou Sud
A step up at 30m² with either sea or south-facing views. Hardwood furniture with light green, beige, and dark brown accents. Bathroom with shower or bath and WC. Good all-rounder room at this price tier.
Extra-large double (convertible to twin) · 30 sqmRégate
The smallest room in the hotel — compact at 16m² and suited for solo travellers. Sea or south-facing views. Good for those who plan to spend most of their time in the spa or on the beach rather than in their room.
16 sqmSuite
The top of the range at 66m². Panoramic sea views, two bedrooms, a welcoming lounge with a long writing table and three bow-windows. Two bathrooms (one bath, one shower). Hardwood furnishings with rich red accents. This is as good as it gets here.
Two double beds (convertible to twins) · 66 sqmSuite Junior
60m² with two separate bedrooms, each with a double bed. Sea views, a lounge area, and two full bathrooms — one with bath, one with shower. Hardwood furnishings and rich red accents. Works well for families or two couples travelling together.
Two double beds (convertible to twins) · 60 sqmTransat Emeraude
South-facing at 24m² with a double bed that can split into twins on request. Dark wood décor with red accents — warm rather than cold. Bathroom with bath and WC. Can accommodate a baby cot. Connecting rooms possible.
Double (convertible to twin) · 24 sqmThe Property
Eat & Drink
4 venues on property
Restaurant
Spa & Wellness
Treatment Menu
On Property
How you'll actually spend your days.
Bikes available to rent from the hotel, useful for reaching the walled intra-muros or exploring the Emerald Coast. Electric bikes reportedly available.
On-site kids club and crèche (day care) for families. Babysitting also available.
The hotel offers preferential rates for local attractions including the Saint-Malo Aquarium, Cobac Parc, Étoile Marine, and Golf. Ask at reception for the Pass Avantage.
Half-day introduction to thalassotherapy at the Thermes Marins — the entry point for first-timers. Bookable without a hotel stay.
Every Monday at 6:30pm, a free conference on thalassotherapy presented by the director of the Thalassotherapy centre. Every Wednesday at 6:30pm, a health nutrition talk from the Thermes Marins nutritionist Frédéric Derat Carrière.
Water sports available via the hotel. A surf and sailing school is located 250m from the property.
Yoga classes available at the hotel's health club.
Amenities & Practical Info
The details that matter for planning.
Professional hairdressing salon at the Thermes Marins. Open Mon–Sat. Call +33 2 99 40 75 25.
Five spacious meeting rooms accommodating groups of 5 to 50. Each equipped with internet, screen, overhead projector, and paperboard. Computerised video projector on request. Gourmet catering available.
Free WiFi throughout all areas including guest rooms.
Dogs and cats accepted in guestrooms (size limitations may apply, charges may apply).
All-year-round indoor pool with heated seawater. Included free for hotel guests. Can get crowded in peak season.
Outdoor saltwater pool, seasonal.
On-site boutique selling clothing, accessories, and Thermes Marins' own line of spa cosmetics. Open Mon–Sat, 9am–1pm and 1:30pm–6:15pm.
Breakfast in-room 7am–10:45am (€31/adult, €12/child 6–12, free under 6). Lunch/dinner service 12:15pm–2pm and 7:15pm–9:45pm.
Multilingual staff at front desk around the clock.
Certified Green Key (Foundation for Environmental Education) as of 2025. Also participates in FairMoove environmental programme.
Complimentary shuttle to Saint-Malo train station (on reservation). Transfer to Rennes airport available at extra cost.
On-site private parking at €20 per day. No reservation required.
Electric vehicle charging stations available on property.
Cardio and strength training equipment. Complimentary access for hotel guests.
BUILD YOUR GRAND HÔTEL DES THERMES PLAN
Rooms, dining, spa, and resort experiences — organized into one trip plan.
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