This paper will analyse how weather conditions impact amphibious planning and the conduct of military operations. More precisely, this paper will scrutinize the different components of the broader concept of weather, assessing the impact that these components can have on amphibious warfare. To write this Info Flash, mainly sources coming from the US Marine Corps were taken into consideration, since they regularly publish analyses and studies. However, analysing the American doctrine regarding amphibious operations makes it possible to make similar considerations for the NATO doctrine, since the Alliance’s doctrines are considerably influenced by the US despite not being public knowledge.