We stayed 2 nights in a small resort called Penarik Inn recently. It is run by a very hospitable couple and their son who speak mainly in very good English. The chalets are very basic in nature with bedding enough for a family of 5. There is cold and hot shower. Although we only had a wall mounted circulating fan (no air conditioning), the chalet remains cool in the day time. We only needed to close the door of the chalet between 7 and 8 pm when mosquitoes and other insects are most active and attracted to light. Night time is a wee bit hot and humid but the air is cooled quickly as the hours go by.
Penarik is located between a river and the South China Seas.