Kunakeshwar Temple is approx. 42 km from Malvan. The temple is also quite old and of historic importance. It is situated right on the beach. The beach here is also nice with white sands.
Besides this, you must visit Rameshwar Temple at Aachare and Brahmanand Swami Samadhi which is approximately 4 km from Malvan city.
Covering all the three locations can be a nice one day trip from Malvan, where you can start after break fast and return to the town in the evening.