Turkey rewards divers who like variety more than extremes: reef-and-wall diving on the Aegean and Mediterranean coasts, swim-throughs and canyons around Kas, and a real wreck menu from classic ships to local training wrecks. Most trips are day-boat or short shore entries, so you can keep a relaxed schedule and still log a lot of bottom time.
The southern Mediterranean coast stays warmer longer, while the Aegean runs a bit cooler and can be windier in summer. Visibility is often in the 10 m to 30 m range on good days, with the clearest water most common in late spring and early fall.
Use these as anchors when planning: Kas for canyon profiles like Kanyon Dimitri Wreck, Bodrum for quick reefs like Fridge Bodrum, and the Izmir coast for easy day boats to sites like Adabanko Reef.