two years ago we were in the area during Guetta's set and found some beach beds (the ones that have drapes) right behind Ushuaia and had a few drinks there. if my memory serves me correct the sound wasn't that bad and we stayed there eating and drinking for a good few hours...by the end all the beds had people sitting and drinking on them.
WhatAlso you can go to ushuaia towel roof bar @ top of the ushuaia towel and listen free but there is a dress code I think
I'd say the sound is awful on the beach. Ushuaia sound guys are pretty clever in the way they contain the sound considering its outdoor. The beach is a far way from the main stage!
Really?