Both the Aegean and Mediterranean coasts have a typical Mediterranean climate with mild winters and hot summers, with temperature often rising above 30ºC (86ºF) in July and August. Showers are unlikely in the summer months, but the rainfall is quite high in winter.
Although Aydin being state capital of Kusadasi, IZMIR has the nearest weather-temperature to Kusadasi..

The monthly average air & water temperatures for Kusadasi are ;