A sunscreen to protect yourself from the sun, a hat or cap to beat the heat, sunglasses, a scarf as you are required to cover your head before entering a mosque, decent clothes that are deemed appropriate for entering a mosque - clothes that can cover your ankles and that cover your shoulders, comfortable shoes, Universal power adapter, a lightweight backpack for easy access to everything you need and swimsuit if you would like to swim in any of the Turkish beaches are the essentials to pack for your Turkey trip.