[en] The coastline of France faces a range of highly specific challenges, in terms of demographics, urbanisation, socio-economic activities and the environment. The attractiveness of coastlines, and the ever-growing trend for soil sealing, is making these territories increasingly vulnerable to the impacts of climate change. The main impacts of climate change are rising temperatures, changing rainfall and cyclone patterns, the acidification of water and rising sea levels - an impact that is addressed in detail in this work. Data gathered since the early 20. century reveal a significant trend, namely that sea levels rose substantially and quickly during the last century, at a rate five times faster than in previous millennia. In statistical terms, the average sea level rose by 1.7 ± 0.2 mm per year between 1901 and 2010, and by 3.2 ± 0.4 mm per year between 1993 in 2014. All current climate models predict that average global sea levels will rise at a rate faster than that observed between 1971 and 2010 during the 21. century. This means that, in addition to the 20 cm rise in sea levels observed in the last 150 years, the sea is expected to rise by a further 26 to 82 cm by the end of this century. The exact rise will depend on the success of efforts to reduce greenhouse gas emissions. Although the rise in average sea levels in the last 150 years may seem insignificant when compared with the height of waves and tides, the IPCC's summary report (2014) suggests that an average rise in sea levels of 0.5 m would, without suitable adaptation and protection measures, result in flooding occurring between 10 and 100 times more often. This report presents: 1 - The main impacts of climate change on the coastline 2 - Climate change and sea level: from the planet to the French coastline 3 - Adaptation - from crisis management to planning: 'Waves and flooding' warnings; Cost of coastal natural disasters and the insurance mechanism; Regulating territories exposed to coastal flooding risks; A national coastal erosion anticipation strategy; Experimental relocation of activities and property: towards spatial reconfiguration of territories threatened by coastal risks; Scientific knowledge, today and tomorrow; The LiCCo project and the perspectives of elected officials on both sides of the Channel