If you wish you can stop at Ratnagiri to visit the museum dedicated to Lokmanya Tilak - the famous freedom fighter, ratnagiri beach. However I would suggest you to avoid the beach at Ratnagiri as there are plenty of virgin beaches you can visit in this journey.
1. Ratnagiri - Pawas :A small little town home to a temple and amazingly beautiful beach of Ganeshgule about 5km from the Pawas town. This was my first impression of the truly empty beaches and mesmerizing sunsets! We went to a small hillside Ganesh Temple and were totally alone on the beach.