- 15.07. 16.08. - 16.09. 15.07. - 16.08. Supplement for half board 1 18.00 18.00 18.00 18.00 Reservations View photo gallery Kos  or  Cos  ( Greek :  Κως ) is a  Greek  island in the south  Sporades  group of the  Dodecanese , next to the  Gulf of Gökova/Cos . The island