This is a secluded little beach between Rawi and Nai Harn Beach. I only found it while trecking between the two locations.
To get to it you follow the coast by road where you will find a restaurant on the shore line. It is secluded so keep an eye out for it. I would recommend getting their by car or moped though as the walk is tough with several sharp inclines and on the main road.
The beach itself isn’t kept as tidy as other beaches in Thailand but the attraction is that it is usually very quite. You have to option to rent beach chairs as usual but there is little else around.
Worth a visit if you can find the place.