Brittany — Water Temperature Today and Throughout the Year
Discover water temperatures in Brittany (France), with real-time data and annual trends. Find all locations in the region and check the water temperature in them. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
- Saint-Malo16°C
- Brest15°C
- Concarneau16°C
- Le Minihic-sur-Rance16°C
- Saint-Cast-le-Guildo16°C
- Quiberon17°C
- Dinard16°C
- Plougonvelin15°C
- Penestin18°C
- Saint-Lunaire16°C
- Le Conquet15°C
- Fouesnant16°C
- Carnac17°C
- Perros-Guirec15°C
- Treffiagat15°C
- Saint-Briac-sur-Mer16°C
- Saint-Quay-Portrieux16°C
- Pléneuf-Val-André16°C
- Douarnenez16°C
- Lorient17°C
- Saint-Brieuc16°C
- Audierne15°C
- Trébeurden15°C
- Cancale17°C
- Arradon17°C
- Trégunc16°C
- Roscoff14°C
- Combrit16°C
- Névez16°C
- Lancieux16°C
- Saint-Jacut-de-la-Mer16°C
- Vannes17°C
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Popular Places
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Brittany, located in northwest France, is surrounded by the Atlantic Ocean, giving it a rich maritime character and a rugged coastline. The seawater temperature along its coasts varies depending on the season. In summer, coastal waters generally warm up to 59°F to 66°F (15°C to 19°C), offering refreshing yet tolerable conditions for swimming, particularly in sheltered bays and beaches such as those in Saint-Malo or Quiberon. In winter, the sea cools down significantly, with average temperatures ranging from 50°F to 55°F (10°C to 13°C), making it less inviting for swimmers but still attracting surfers and other enthusiasts of cold-water sports.
In addition to its coastal waters, Brittany is dotted with lakes and rivers, including the famous Vilaine and Blavet rivers. These freshwater bodies tend to warm up more than the ocean in summer, often reaching temperatures of 68°F to 75°F (20°C to 24°C). Such conditions make them ideal for activities like kayaking, paddleboarding, and even swimming. However, in cooler months, these waters can drop to 41°F to 46°F (5°C to 8°C), creating a stark contrast to the livelier summer season.
The combination of Brittany’s cooler ocean waters and warmer inland lakes and rivers ensures a diverse aquatic experience for visitors. Whether it’s exploring the dramatic tides of the coastline or enjoying the calmer inland waters, the region offers a variety of activities tailored to both relaxation and adventure.