Greece - a small country (by Russian standards), but the climate in its different corners and islands is different.
Thassos is the northernmost island of Greece, located in the Aegean Sea. It has a cool winter (about 0-5 degrees Celsius), and a hot summer (up to 40 degrees). In the summer in the daytime, the siesta is very stuffy and it is necessary at this time to be in the coolness of the air conditioner in the car or indoors.
In the spring and autumn often rain and just cloudy. Autumn here begins earlier than on the southern islands of Greece, in September the amount of precipitation increases sharply. In October, Thassos can only pay tribute to excursions, while somewhere in Crete or Rhodes you can still swim in the sea.
As for the season, in the last couple of years there has been a tendency towards a later offensive of a hot summer, pleasant weather for sunbathing and bathing is established no earlier than mid-June. If you arrive earlier in Greece, then most likely you will spend a significant part of the rest with the rain and the unheated sea. For someone who is tempered and not pampered, or just missed the sea, will be happy and such a water temperature (about 19-20 degrees).
You can view the average weather by month on Thassos on our website.