Agadir features a hot semiarid climate with warm summers and mild winters. Located along the Atlantic Ocean, Agadir has a very temperate climate. The daytime temperature generally stays in the 20s °C (70s °F) every day, with the winter highs typically reaching 20.4 °C or 68.7 °F in December and January.
Rainfall is almost entirely confined to the winter months and is heavily influenced by the NAO, with negative NAO indices producing wet winters and positive NAO correlating with drought. For instance, in the wettest month on record of December 1963, as much as 314.7 millimetres or 12.39 inches fell, whereas in the positive NAO year from July 1960 to June 1961 a mere 46.7 millimetres or 1.84 inches occurred over the twelve months. The wettest year has been from July 1955 to June 1956 with 455.5 millimetres or 17.93 inches.
Occasionally however, the region experiences winds from the Sahara called Chergui, which may exceptionally and for two to five days raise the heat above 40 °C or 104 °F.
In 1950, a poster from the Navigation Company Pacquet proclaimed: “Winter or summer, I bathe in Agadir”.