Nai Harn is one of the island's most popular places with in-the-know locals. This relatively tranquil place has only a few hotels and is a popular anchorage for boats during the high season.
Great for swimming from November to April, care should be take in the low season (May-October) when there can be strong undertows. The local restaurants just above the beach make a great place to relax with a sundowner.
Further south is Ya Nui, a sandy cove that attracts snorkelers and divers. Another out-of-the way spot nearby is the tiny beach of Ao Sane, a great spot for snorkeling, reached by taking the road that starts at the car park.
This place has been my second home for 6 years and I have really enjoyed swimming and surfing and sun bathing. Take your children and other family or friends to maximize the experience.
There are currently no umbrellas or beach sofas. Be sure to bring something to lie down on, sunscreen, bottles of water and your swimsuit. At sunset, it is a amazing place to watch it go down and take long walks on the beach.
The cache is to the right end of the beach (facing the sea) near the river which local children like to swim in (but it is also mixed with sewage water from Nai Harn). The cache is a Lock & Lock 850ml and has an official geocaching sticker. There are some trade items inside and a pen.
Note: Coordinates are plotted with Android, if could provide better coordinates I would be much obliged.