The beaches vary in sizes,gets narrow towards the appartments i stayed in.But if we walked to the right from our appartment,about half a mile up the coast,the stoney waters gave way to sandy waters.Great the swim in.Its also a nudist part of the beach,and was very isolated in may when i was there.Great news if you just want to chill and bathe.The breeze off the tingaki side of the island makes bathing even better.The waters cold too,takes a bit of getting used to,maybe it warms up in the summer months.
Having just returned from my first trip to kos,i liked the irini beach apartments.Its situated away from the town,and i found it a long way to walk especially along the dusty narrow roads.So be prepared to catch a bus or taxi for your journeys.The apartments were clean and spacious,with the bare essentials of self catering.We were on the ground level and ants were a problem in the apartment,so dont leave and food about.Also snails,hundreds of them seem to like the white walls.We had a couple of cats come over for food,which i bought for them every day we stayed there.Good bar and lounge,great pool area, small shop and bike hire at the front.Fantastic views.Would definatly consider irini beach again.