 Méridja is located at an elevation of on the extensive hamada west of Béchar, about west of the Djorf Torba dam on the Oued Guir.Some low, rocky hills rise both to the north and south of the town, but there are no significant mountains in the immediate vicinity of the town.Méridja has a hot desert climate (Köppen climate classification "BWh"), with extremely hot summers and cool winters, and very little precipitation throughout the year.