Andros, the northernmost and second largest island in the Cyclades after Naxos, covers an area of 374 sq. km. Its maximum length is 39.8 km and its maximum width 16.7 km. It has a 177 km coastline and according to the 1981 census 9,000 inhabitants. The island is only 36 nautical miles away from the mainland and in proximity to Evoia, Tinos, Myconos and Syros. It is accessible by ferry boat from the port of Rafina and also by the nearby islands.
The island lies amid various small rocky islands like the Gavrionisia, Tourlitis, Lagonisi and Hora Castle. Its northernmost point is cape Kambanos and the southernmost point is cape Steno.
Andros' shores are quite rocky with many sheltered coves like the cove of Vitali, Korthi, Gavrion and Batsi. The landscape is made up of adjoining mountain ranges with steep slopes and between them deep ravines, gullies and verdant valleys. Its highest mountains are Petalo and Kouvara (maximum altitude 997m.). In the northern part of Andros the area of Arni is rich in thick foliage and has a plentiful supply of running water. The island has many torrents and plenty of fresh water springs, since the geological formation of its subsoil helps preserve rainwater. There are four rivers, which run from west to east through verdant valleys reaching out into expanses of sandy beaches. Many of its springs that are rich in minerals have curative attributes. The springs of Sariza, and Arni are the most well known.
The climate in Andros is temperate, with mild winters and cool summers, thanks to the northeastern winds known as meltemia.