Near Es Grau Beach is located Arenal d'en Moro, for local people is considered the best Beach of Colom Island. It doesn't have any kind of building or construction so it is one of the best virgin beaches of Menorca.
Visiting Arenal d'en Moro is recommended any time in Summer, as is a very remote and uninhabited spot we are not gonna find tons of bathers like other Menorca beaches. However, private boats used to anchor in the surroundings of Colom Island and Zodiacs from them used to dock on the Beach.
The Beach is East oriented and it's possible to go unless there are strong Tramontana (North) winds. That only happens a couple of times in Summer, so if you stay for a week for sure you will be able to visit Arenal d'en Moro.
All other winds will not affect you for visiting that awesome natural beach with turquoise waters. The Beach is protected like a Bay, so it's protected from the swell.
As this beach is located on an island and there are no bridges to cross it, we can only access by boat or other alternatives we will tell you. Going to the Island swimming is not recommended, although is only a 300 meters trip, there're a lot of boats sailing on the area, so it could be dangerous.