France — Water Temperature in Seas, Lakes and Rivers
Check today’s water temperatures across France, including seas, lakes, and rivers. View real-time updates and seasonal ranges for both coastal and inland waters. 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
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
France offers a wide range of natural swimming conditions because of its long coastline and many inland waters. Along the Mediterranean coast, sea surface temperatures typically range from about 13–15 °C (55–59 °F) in winter to 22–27 °C (72–81 °F) in summer, with Corsica often on the warmer end. On the Atlantic coast and the Bay of Biscay, water is cooler: winter values commonly sit near 10–13 °C (50–55 °F) and rise to roughly 18–22 °C (64–72 °F) in summer. The English Channel and northern coasts are colder still, with summer temperatures often 12–18 °C (54–64 °F) and winter near 8–12 °C (46–54 °F). Inland, lowland lakes and major rivers can warm to comfortable levels in summer — many lakes reach 20–24 °C (68–75 °F) and rivers such as parts of the Loire or Rhône can be in the high teens to mid‑20s °C (mid‑60s to mid‑70s °F) — while alpine lakes and mountain streams remain much cooler year‑round, often 8–15 °C (46–59 °F).
Swimming Conditions
Swimming is generally allowed in France but is governed locally for safety and water quality reasons. Coastal bathing is often concentrated on designated, monitored beaches during summer with lifeguards and flags; away from these zones swimmers should be aware of tides, rip currents and boat traffic. Inland, municipalities may open or close lake and river sites according to bacterial contamination, toxic algae blooms or hydrological hazards, so signage and local advice determine permissibility. Overall, summer months (roughly June to September, earlier on the Mediterranean) are the main swimming season, with conditions and regulations varying by region and specific site.