Carnac Tide Times 2027: Spring Tides and Shore Fishing

Practical information
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In Carnac, the sea goes out twice a day and uncovers a vast foreshore of sand and rocks. In 2027, the biggest tide of the year falls on Thursday 2 September, with a coefficient of 112. The beaches of Beaumer and Men-Dû are 500 m from Camping Les Druides: here are the dates to note, the spring tide times for the season and the rules for safe shore fishing.

⚠️ The times in this article are SHOM forecasts for the port of La Trinité-sur-Mer, the closest to Carnac, in local time. Wind and atmospheric pressure can shift them: always check the day's tide before you set off. The campsite provides this information; it does not organise shore fishing outings or water sports.

A sandy beach at low tide at sunset, pebbles and waves, Quiberon Bay near Carnac

🌊 Understanding the tides in Carnac

On the Atlantic coast there are two high waters and two low waters a day, about six hours apart. The difference between the two varies with the position of the Moon and the Sun.

  • A tidal range of more than 5.5 m at the biggest tides: on 2 September 2027, at La Trinité-sur-Mer, the sea will fall to 0.34 m at 12:42 and then rise to 5.88 m at 18:47.

  • Around 2 m at neap tides: with a small coefficient the sea barely moves and most of the foreshore stays covered.

📏 The tide coefficient

The coefficient, calculated by the SHOM for the port of Brest, measures the size of the tide along the whole Atlantic coast. It ranges from 20 to 120.

  • Around 45: an average neap tide, the sea goes out very little.

  • Around 95: an average spring tide, a large part of the foreshore is uncovered.

  • Above 100: commonly called a big spring tide. The sea drops very low, then comes back quickly.

📅 Spring tides 2027: the dates to note

☀️ During the campsite season (17 April – 2 September 2027)

Coefficient of the day and time of the midday low water at La Trinité-sur-Mer:

  • Wednesday 21 April: coefficient 95, low water at 12:06 (0.82 m).

  • Friday 7 May: coefficient 92, low water at 12:13 (0.88 m).

  • Sunday 6 June: coefficient 91, low water at 12:42 (0.93 m).

  • Tuesday 6 July: coefficient 99, low water at 13:21 (0.72 m).

  • Wednesday 4 August: coefficient 108, low water at 13:04 (0.45 m). Series of spring tides from 3 to 6 August.

  • 🏆 Thursday 2 September: coefficient 112, the biggest tide of 2027, low water at 12:42 (0.34 m). Series of spring tides from 31 August to 4 September.

❄️ Out of season

  • Sunday 24 January: coefficient 107.

  • Monday 22 February: coefficient 110.

  • Tuesday 23 March: coefficient 106.

  • Thursday 30 September and Friday 1 October: coefficient 108.

  • Friday 29 and Saturday 30 October: coefficient 97.

No coefficient exceeds 100 in November or December 2027.

🎣 Shore fishing: choosing the right moment

The best outing combines a high coefficient with a low water in the middle of the day, such as 4 August or 2 September 2027. Go down onto the foreshore before low water. As the SNSM lifeboat service reminds us, the signal to head back is the time of low water: the way back always takes longer than the way out.

📍 Where to fish near the campsite

  • Beaumer beach, Carnac: 500 m from the campsite, known among shore fishers for clams, cockles and razor clams. → Directions

  • Pointe Churchill, Carnac: an oyster bed monitored by ARS Bretagne. → Directions

  • Men-Dû beach, La Trinité-sur-Mer: 500 m from the campsite. Its cockle bed was classed "fishing not recommended" in the ARS bulletin of September 2026. → Directions

Water quality changes from one analysis to the next: check the ARS Bretagne interactive map before every outing.

🐚 Minimum sizes and quantities in the Morbihan

Maximum quantities per fisher per day:

  • Clam: 4 cm (Manila clam: 3.5 cm), 150 a day (100 in the Gulf of Morbihan).

  • Cockle: 2.7 cm, 300 a day.

  • Razor clam: 10 cm, 60 a day.

  • Mussel: 4 cm, 300 a day.

  • Pacific oyster: 5 cm, 60 a day. Flat oyster: 6 cm, 60 a day.

  • Winkle: no minimum size, 500 a day.

  • Abalone and scallop: fishing closed during the summer.

Source: recreational shore fishing regulations in the Morbihan (Littorea network, based on the orders in force). The rules may change: check them before your outing.

✅ The rules to follow

  • No shellfish gathering between sunset and sunrise.

  • Sort your catch on the spot and release any shellfish that are too small.

  • Put back any stones you have turned over and fill in the holes.

  • Do not fish within 15 m of oyster beds or in eelgrass meadows.

  • Selling your catch is forbidden, in any form.

🛟 Your safety on the foreshore

  • ⏰ Check the time of low water and the coefficient before you set off.

  • 👥 Do not go alone, and tell someone close to you where you are going.

  • 🌊 Watch the rising water and beware of fog.

  • 📱 Take a charged phone. Emergency at sea: 196. From the beach: 112.

  • 🧊 Avoid fishing after heavy rain, keep your shellfish cool and eat them within 24 hours.

🚣 Swimming, sailing and walks according to the tide

At low tide the sea moves away and the beaches grow bigger. With high coefficients it comes back quickly: settle above the high-water mark and keep an eye on the children. In July and August, the Grande Plage in Carnac is supervised.

For sailing and kayaking, launch times often follow the tide: ask the Yacht Club de Carnac or the harbour at La Trinité-sur-Mer. On foot, the customs officers' path (GR34) runs along the coast and offers fine views over the foreshore. All the beaches in the area are presented in our guide to the beaches of Carnac and La Trinité-sur-Mer.

📋 Where to check the 2027 times day by day

❓ Frequently asked questions

What is the biggest tide of 2027 in Carnac?

Thursday 2 September 2027, with a coefficient of 112. At La Trinité-sur-Mer, low water is forecast at 12:42 (0.34 m) and high water at 06:38 (5.68 m) and 18:47 (5.88 m).

What are the spring tides of summer 2027?

6 July (coefficient 99), 3 to 6 August (108 on 4 August) and 31 August to 4 September (112 on 2 September).

When should you set off for shore fishing?

Go down onto the foreshore before low water and head back as soon as that time is reached, because the sea comes back faster than you think. Also check the ARS Bretagne map for the sanitary quality of the site.

Are the beaches far from Camping Les Druides?

No: the beaches of Beaumer and Men-Dû are 500 m from the campsite.

📞 Practical information

⚠️ Camping Les Druides shares this information for guidance only. It does not organise shore fishing outings or water sports. The times are SHOM forecasts: check the day's tide before any outing.

ℹ️ Carnac Tourist Office

Address: 74 avenue des Druides, 56340 Carnac → Directions
Telephone: +33 2 97 52 13 52
Website: www.ot-carnac.fr

🏕️ Camping Les Druides

Address: 55 chemin de Beaumer, 56340 Carnac → Directions
Telephone: +33 2 97 52 08 18
E-mail: contact@camping-les-druides.com
Website: www.camping-les-druides.com/en

Mobile homes and pitches 500 m from the beaches: see the 2027 prices and plan your stay to coincide with the spring tides.

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