800 metres of soft sand between dunes and ocean
La plage du Treustel s'étire sur 800 mètres de sable fin le long du littoral de Combrit, orientée plein sud face aux îles de Glénan, à environ 15 minutes de Fouesnant. Bordée de dunes protégées par le Conservatoire du Littoral, elle fait partie d'un cordon dunaire de 3,5 km reliant Sainte-Marine à Île-Tudy, adossée au Polder de Combrit (350 hectares de prairies et sentiers). L'une des plus belles plages du Pays Bigouden, elle reste pourtant méconnue des touristes — et la Véloroute qui longe le Polder permet de la rejoindre agréablement à vélo.
Treustel in pictures
⭐ 4.6/5 Visitor reviews (Google, Combrit Sainte-Marine area)
⭐ « Superbe petit village. Quelques terrasses. De très belles balades à faire. »
Thierry B., Google (5/5)⭐ « Le petit port de Sainte-Marine est un petit coin de paradis dans notre beau Finistère. Les promenades en bord de mer avec des supers chemins côtiers allient beauté, calme, odeur et charme. »
Jean-Marie D., Google (5/5)⭐ « Très joli petit port. Mérite d'être connu et visité. »
Bertrand G., Google (5/5)
Protected dunes, a coastline on the mend
The Treustel dune system is a fragile habitat, battered by the sea and worn by foot traffic. For several years, an ambitious dune restoration programme has been run jointly by the Conservatoire du Littoral, the Finistère county council and the local authority (CCPBS).
The work has included a major sand replenishment of 3,750 m³ dredged from the Perdrix channel, topped up with a further 4,000 m³ from Île-Tudy. These operations rebuild the natural profile of the dune and offset the retreat of the shoreline. In February 2026, the CCPBS launched a fresh round of reinforcement targeting the most vulnerable stretches of the barrier.
The sand fences that criss-cross the dunes play a key role: they trap windblown sand and help pioneer plants take root. Marram grass, sea holly and sea bindweed are gradually recolonising the restored areas. Information boards at the beach entrances explain this process and encourage visitors to stick to the marked paths.
The restoration work is both visible and encouraging. The Treustel dunes are a real-world example of how a coastline can bounce back when human intervention works with nature rather than against it.
Lifeguarded swimming and water quality
Treustel Beach is lifeguarded in July and August, from 1 pm to 7 pm. A first-aid station is set up on the sand throughout the supervised period. Bathing water quality is rated "good" by the regional health authority (ARS).
The south-facing aspect and gentle slope make for pleasant swimming conditions, especially for families with young children. In summer, the water temperature ranges from 16 to 19 °C, averaging around 17 °C in August, slightly warmer than the open sea thanks to the shelter of the dune barrier. At low tide, the sand extends into a wide flat expanse ideal for sandcastles and paddling. At high tide, there is still plenty of room to settle in comfortably.
A beach wheelchair (Hippocampe) is available for visitors with reduced mobility, giving independent access to the water. Ask at the lifeguard station during supervised hours.
Dogs on the beach
Dogs are not allowed on the beach from 1 May to 30 September. The fine for non-compliance is 38 euros. Outside that period, dogs are welcome on the sand.
During the summer months, try the paths through the Polder behind the dunes, where dogs are permitted on a lead. The GR34 coastal footpath also offers lovely walks with sea views, without breaking any rules.
Watersports at the Treustel sailing base
The Treustel Watersports Centre (Antenne nautique du Treustel) runs a full programme of activities throughout the summer season, right on the beach. The south-facing bay and sheltered waters make it a great spot for beginners and improvers alike.
- Sea kayaking: paddle along the coast between Sainte-Marine and Île-Tudy, discovering coves you cannot reach on foot
- Stand-up paddleboarding (SUP): ideal for beginners thanks to the calm, shallow waters
- Surfing: introductory lessons on the gentle swell that builds on moderate days
- Sea walking (longe-côte): a popular French watersport that involves walking chest-deep in the sea, combining fitness with the therapeutic benefits of cold water
Sea walking is particularly well suited to this beach: the gentle slope and sandy bottom let you wade waist-deep for long stretches without any rocky obstacles. Several groups meet regularly at Treustel for guided or independent sessions.
Walking: the Polder Circuit and the GR34
Treustel is a perfect starting point for walkers. The Polder Circuit is a 12-kilometre loop (around 3 hours 45 minutes) that winds through a variety of landscapes: dunes, wet meadows, former salt marshes, pine woods and open coastline. The route is waymarked and partly follows the GR34, the famous long-distance coastal path that runs the entire length of Brittany.
The Combrit Polder behind the beach is a remarkable 350-hectare nature reserve. Originally land reclaimed from the sea (the word "polder" is Dutch in origin), it is now a mosaic of grassland, ponds and accessible footpaths. Birdwatchers come here for the grey herons, little egrets, Eurasian curlews and, in winter, brent geese that fly in from the Arctic.
Along the way, look out for two heritage gems: the Menhir du Treustel Névez, a Neolithic standing stone that bears witness to thousands of years of human settlement on this coast, and the Pigeonnier de Kerscuntec, an elegant round tower from the 17th century, a remnant of the former Kerscuntec estate. Both are freely accessible from the trail.
Getting there and parking
Treustel Beach is in the commune of Combrit, roughly 15 minutes by car from Fouesnant. There is a free car park nearby. From the car park, a surfaced path through the dunes (a few hundred metres) leads down to the sand. Sand fences line the route and protect the dune vegetation.
By bike, the cycle path along the Polder connects Treustel to Sainte-Marine (around 10 minutes) and Île-Tudy (around 15 minutes). This is a recommended alternative in high season, when parking can fill up quickly.
Where to eat nearby
Treustel Beach is a short drive from the port of Sainte-Marine, one of the most charming harbours in southern Finistère. Three standout addresses are just minutes away.
Le Café du Port
📍 2 Quai Jacques de Thézac, 29120 Combrit
📞 02 98 56 44 36
💰 Set menus 39 to 62 euros
⭐ 4.5/5 (1,485 reviews). Certified Maître Restaurateur. Seafood and brasserie dishes with a terrace overlooking the harbour.
Crêperie La Misaine
📍 4 Quai Jacques de Thézac, 29120 Combrit
📞 02 98 51 90 45
💰 Around 20 euros
⭐ 4.5/5 (918 reviews). Traditional Breton crêperie on the quayside. Savoury buckwheat galettes and sweet crêpes, washed down with farmhouse cider.
Les Trois Rochers (Villa Tri Men)
📍 16 Rue du Phare, 29120 Combrit
📞 02 98 51 94 94
💰 Set menus 39 to 100 euros
⭐ 9.6/10. One Michelin star. Fine dining with ocean views in the stunning setting of Villa Tri Men.
Where to stay nearby
Treustel Beach is just 15 minutes from Fouesnant and Cap Coz Beach. Our apartment Avel Heol, a sea-view duplex at Cap Coz, makes an ideal base for exploring the coastline around Combrit, Sainte-Marine and Île-Tudy.
