Apple’s iPhone event has pretty much been set in stone for September 10, which also means iOS 7 will be released too. According to BGR, who has been accurate in relaying iOS 7 beta news, its sources inform them beta 6 will be released next week, while the golden master version will be sent to partners on September 5 and final release at the iPhone event:
Our sources have not confirmed which day, though Monday makes the most sense as it has been the typical release day in the past. After iOS 7 beta 6, Apple will be seeding a GM (gold master) version for its employees and partners to test starting around September 5th.
With Apple already notifying the world at WWDC 2013 iOS 7 would be released this fall, this timeframe is pretty much expected. No betas were seen this week so next week would mark about two weeks since beta 5.