Originally Posted by ISTFlyer

It is literally a right place to write but I have also created a lounge thread in the Miles&Smiles forum.
All Turkish Airlines Lounges, including the domestic one would be 7/24. I am not sure about the Exclusive Lounge and the arrival lounge that would open in a future date but I am sure that the domestic lounge, the international Business and international Miles&Smiles lounge would be open at that time in the morning similar to the Atatürk Airport lounges.