We'll need more data points to say that with any realm of certainty. It's hard to tell if it'll be consistent from one day to the next. The best plan of attack would probably be to keep the app handy and keep checking it every few minutes after 7am to wait for the predicted wait time to match what you're hoping for. This morning, at 7:02am, the estimated return time was 190 minutes (around 10:10am) - you might not have to wait all that long. But it was also the first day - it might be different tomorrow.
If I had to spitball, I'd say you'd probably be fine between 7:30am and 8am. But it'd probably be worth monitoring it in real time, if you can.