- Maximum length
- 23 ft
Small tidal harbour at the head of the Seudre estuary, opposite the Île d'Oléron, in Charente-Maritime.
Guide
Approach and anchoring
Access via the buoyed Seudre channel from the Pertuis de Maumusson. Channel dries at low water and is usable around HW plus or minus 2 hours for a shallow draught. Beware of strong cross-tidal currents on the ebb near the Pont de la Seudre. Oyster beds marked with withies along both banks.
Practical
Six berths only, so most visitors use the larger Port à sec at Mus de Loup 0.8 NM to the north-west or Cale Ronde 1 NM to the south. Fuel station nearby. Town centre at 1.5 km with shops, bakery and pharmacy.
Ashore
Église Saint-Pierre-de-Sales with its 85 m Gothic spire, a seamark for the Seudre, stands in the town centre. Cité de l'Huître at Marennes-Plage, 2.5 km, explains the oyster-refining claires. Cycle path along the former railway line to Bourcefranc and the Oléron bridge, 6 km.
History
Marennes has refined oysters in shallow clay basins called claires since the 17th century. The Marennes-Oléron basin remains the largest oyster-producing area in Europe and the Fine de Claire and Spéciale de Claire carry a Label Rouge since 2009.
Key facts
- Type
- Harbour
- Coordinates
- 45.79102, -1.12535 (45°47.46'N 1°7.52'W)
- Town
- Saint-Just-Luzac
- Country
- France
- Maximum length
- 23 ft
- Updated
- July 7, 2026
Getting there
Marennes lies at 45°47.46'N 1°7.52'W, that is 45.79102, -1.12535 in decimal degrees.
Boaters' reviews
No reviews yet. Be the first to share your experience of Marennes.
Write a reviewFrequently asked questions
What boat length does Marennes accept?
Marennes accepts boats up to 23 ft.
Explore the region
Nearby cities
The free boat navigation app
Official nautical charts, marine weather, GPS and 50,000+ marinas and anchorages with reviews. All in one app, ready to sail.









