Arugam bay is a world famous place for surfing. I would recommend this place to anyone who wants to bath in the sea and surf.
Though the beach is beautiful , I don't think it is a good place to relax. It is busy with local fisherman and large groups of locals (during off season).
Please be cautioned that this area had bad reputation for safe walking at night...I was warned not to stray too far from my hotel since it was not safe.
..please ask before you venture off just to be safe...the area is a struggling 3rd-world town and country but especially watch east coast for safety sake