Must visit this beach if you come to Chalki. It is a small sandy beach with a restaurant. The water is very clean, we enjoyed it very much. If you swim with swim glasses you can see the sea life at the bottom. You can rent sun-bed for 4 Eur for the whole day but you can also just put your stuff somewhere and swim. I don’t recommend the restaurant.
The best beach in Halki by far. It is a 10-15 minute walk from Halki port. The path is easy to walk but is made of pebbles (don't bring suitcases). There are sunbeds, a restaurant and paid showers. The water is crystal clear and there are lots of fish. I recommend this beach for relaxing and also for activities like snorkelling.