Possidi is a coastal settlement of the municipality of Kassandra. It is located west of the Kassandra Peninsula on a promontory in the Thermaikos Gulf, where the homonymous cape is located, in the area of ​​the Kalandra settlement of which it is a seaport. It has been referred to since ancient times as a settlement of ancient Halkidiki and today is best known as a holiday settlement, in which there are holiday homes, hotels and campsites.