Serenity Beach is one of the less touristy beaches in Pondicherry. There are a few guest houses and hotels, and one cafe on the road parallel to the beach, but not even a single bit of shade on the beach itself.
Went to Serenity Beach in the afternoon, and it was a bad idea - it was super hot and there was no shade, shack or trees on the beach. Went back in the evening and it was much better. Swam in the water a bit, though it is not advised. There were a few tourists and locals, not more than 20 people on the beach.
Paradise beach is the better beach in Pondicherry.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.