Climate
The island is located in the middle of the Marmara Sea, reflecting the characteristics of the climate of the region, as well as the Mediterranean and Black Sea climate. The average temperature in summer is over 30 degrees Celsius. It is located in the middle of two different climatic zones. One of the other important factors that make the island beautiful is that it is possible to swim from June to the end of September, even in October.

Where Does the Name “Avşa” Come From?
Where Does the Name “Avşa” Come From? There are many names that have changed over the centuries Diogenes of Kyzikos distinguished between Ofiousa and Fisia while describing the Propontis Islands. The name of the island was written as AOSiA in the 1892 testament given by the Patriarchate to Gedeon, who made historical studies on the Marmara Islands, before the Greeks left the island, they used the name AFISSIA. Later, AVŞA, which is the Turkish version of the island’s historical name, started to be used.

Island History and Archeology
The first written information about the first indigenous people of the island is in the books of the geographer Strabo and the historian Pliny. The island, which has never been rich in terms of land status, has never gained an independent administration, has been behind the dominant force in history as a place of exile for Christian clergy. It was used and was empty throughout the Middle Ages. No systematic excavations have been carried out until now. However, some primitive communities lived on the island before leaving the mainland Kapıdağ Peninsula, lived by hunting, developed a new way of life when they were disconnected from the mainland, reduced hunting and made their living by agriculture, livestock and fishing. Various flint, bone, etc. tools, spindle whorls, millstones, different axes found on Avşa beaches in recent years strengthen the idea that the settlements on the island go back to old times than written sources. The entire surface of the island Neolithic – Early Bronze Age – Kal It is filled with colitic – Hellenistic – Roman – Byzantine – Ottoman pottery pieces. Apart from these surface finds, all various Roman vessels, tomb steles, amphorae, inscription fragments, altar, column body fragments, Byzantine architectural fragments are found in the foundations of the house or in any other way. North of Çiftlik, on the hill and by the sea, on the beach, the “tile tombs” lined up in rows have emerged in an easily visible “in situ” state, as a result of the erosion of the sea’s coast. However, they disappear day by day. In Kukuma Ridge, just above the Ottoman cemetery, a Roman tomb covered with a large marble slab and the bones in it were broken and disappeared. Similar to the Roman steles called “Istanbul-type steles” found during the construction of the town hall, half broken fragments, possibly a Thracian stele, were preserved.This indicates that the island was home to various societies. important The Roman altar, which is exhibited in the open-air museum in Erdek today, is decorated with garlands and sacrificial plates, bucranions. This “in situ” find was taken because of indifference. The altar is very important in terms of showing how magnificent the Roman culture on the island is. meters deep cubes (Pithos) stand with their skeletons inside.Elder Bronze Yortan Culture is very common in Manastır Mevkii Except for the cube tombs in the sea and votive objects (Piccisses, lids, spindle whorls), in a 4 meter deep well opened in Monastery 8 Pieces of Yortan jugs and mugs were found in “in situ”. Remains of Roman and Byzantine cultures are abundant in the monastery and its surroundings. There are also gold diadems and earring fragments from the sea. The samples are too many to count. It is accepted that there is a ground shake that will collapse meters. In the Manastır area, the monastery, which also named the Monastery Mevkii, was built 360 years ago, the Agios Georgios (Panagia-Virgin Mary) Monastery, consisting of 40 rooms or cells, and the chapel remains are the only work of the island.This ruin is very much due to the indifference and the various use of the provinces. Until recently, there were frescoes according to the information given by the inhabitants of that area. Unfortunately, there is nothing left of these frescoes in the future. It is necessary to systematically excavate the island to fill the gap between these findings and the first written documents.