The following factsheet presents key data for understanding the impact of sea surface and air temperature changes on Mediterranean Marine Protected Areas (MPAs). The Mediterranean is in fact one of the world’s most vulnerable regions to climate change. Due to its particular geographic location, lying at the crossroads of arid North-African and temperate Central-European climates, all changes in Mediterranean seawater and air circulation are likely to affect its ecosystems and climate. The current temperatures registered in air and seawater show clear evidence of both local and regional climate changes, which strongly affect MPAs and their biodiversity, as well as local communities and visitors.