A few days after the Paris Agreement entered into force, Marrakesh hosted the 22^nd session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP22) from 7 to 18 November. Météo-France attended as part of a conference in the “Blue Zone” on the topic: “Water cycle and climate change, from an understanding of the phenomena through to climate services”. Véronique Ducrocq and Maryvonne Kerdoncuff, both climatologists, presented the research conducted on understanding and modelling the water cycle, to support the development of climate services – not least as part of the international project HYMEX on the water cycle in the Mediterranean.