Beach recommendations for Mykonos?

[mbr_33]

Looking for recommendations for a beach on Mykonos that is not too hard to get to from the port and preferably not too crowded (although I don't know how possible this is considering we'll be there in July). We're thinking of doing a 4 hour private tour of the island and not sure if we should try to work some beach/swimming time into the tour or just do that after the tour ends, so we don't waste tour time.