Agios Georgios beach is in the eastern part of Sikinos.
The beach of Agios Panteleimon is small and covered with pebbles. In the clear waters you can swim in peace, and if you haven't catered for shade, you should seek it in a small cave that exists in the region.
To reach Agios Panteleimonas you will have to walk following the island's trails. Another preferable and certainly more convenient way to approach it is from the sea.