Google Maps is on a hot streak. First they announce that they can tell you how crowded a restaurant is at any time, and now, they want to help you find parking. Yes, the tech company now let's you route your journey and figure out what to do with your car when you get there.
Right now the feature is only available to Android users, and the predictive function doesn't actually monitor real time parking possibilities. Instead, Google Maps will use historical data to tell you how crowded a parking lot or neighborhood might be.
The function should rollout to all users soon. Until then, maybe circle the block a few more times.