Ciao! It really depends on the type of atmosphere you are looking for. If you want to have fun but avoid places being too crowded, I recommend June or September for cheaper prices.
July and August are instead the best choice if you are looking for a more intense party holiday. Clubs are full every night, famous DJs perform at beach clubs and events, and many beach parties start in the afternoon and continue until sunrise. For this kind of trip, is recommend organising everything in advance, especially accommodation, beach clubs, and event tickets. I can help you with this if you want a worry-free stay! For the biggest DJ events, tickets should usually be bought a few weeks before because many parties sell out very quickly during summer.😉