Dress codes and cultural hints
Though dress codes on the beach are entirely informal, they’re much less so away from the sea; most Greeks will dress up to go out, and not doing so is considered slovenly at the least. There are quite a number of nudist beaches in remote spots, with plenty of locals enjoying them, but on family beaches, or those close to town or near a church (of which there are many along the Greek coast), even toplessness is often frowned on. Most monasteries and to a lesser extent churches impose a fairly strict dress code for visitors: no shorts, with women expected to cover their arms and wear skirts (though most Greek women visitors will be in trousers); the necessary wraps are sometimes provided on the spot.
Two pieces of body language that can cause unintentional offence are hand gestures; don’t hold your hand up, palm out, to anybody, and don’t make an OK sign by forming a circle with your thumb and forefinger – both are extremely rude. Nodding and shaking your head for yes and no are also unlikely to be understood; Greeks use a slight forward inclination of the head for yes, a more vigorous backward nod for no.