Upvote:1
The nightlife of Mykonos is intense from June to September! But if you rent a motorbike to Mykonos or some other means, do not drink and drive!
Upvote:5
September is not exactly 'post-season'. It's surely not gonna be like July and August but there are gonna be some parties till mid September and the island is not gonna be empty.
Here's a blog where they write about events in mykonos.