Aloysius Chia
Google
There's no doubt that this is the quietest main beach on Samui. There is no person in sight at all, other than a couple of guys bringing out their dogs out for a walk. The sand is a little more on the coarser side, so it may not be the most comfortable to lie on, although there are hotels and resorts where one can stay along to relax without getting sandy. The beach is relatively clean but it can get narrow at certain stretches, so abit too near to the waves to lie down. You'll have to bring your own mat cause there are none laid down by any accommodation on the sandy beach. Although very beautiful, one will feel a bit solitary lying there alone, unless you're specifically looking for something like that. There is nary a pub, cafe or drinking place on the stretch, so that contributes to the quietude you'll definitely get when you're around.