Whilst a little further away, a trip to the hot springs and the pools near Klong Thom is well worth it.
There are hot springs in the jungle with running warm spring water, which you can laze in.
Nearby in the Khao Phra Bang Khram Nature Reserve there are a collection of pools reached by a short walk into the forest.
The Emerald pool is large and full of beautifully clear turquoise water in which you are allowed to swim. Another short walk through interesting scenery (forest affected by minerals in the hot springs) you can reach the very picturesque Blue Pool.
You could easily drive yourself to the hot springs, or could arrange to be taken on an organised tour, from any of the beachfront tour operators.