Going by Apple's track record the new iPhones may launch around September and October. Meanwhile, the Cupertino major is all set to kick off its developer's event aka WWDC 2019 today where the company is said to announce iOS 13 -- which is run the new iPhones. Apple is also expected to announce new MacBooks at WWDC event today.
https://www.indiatoday.in/technology/news/story/apple-iphone-11-iphone-11-max-triple-camera-setup-launch-specs-1541197-2019-06-03