Way to... usually emphasises something and is part of a common phrase. "Way to go!", for example. Here it doesn't add much to the meaning but is just a style of speaking. Hope that helps! :)

Hi Vincent! The context is not clear, but it's probably a manner or a method to say something obvious.

It’s short for (What you just said was a) way to state the obvious! This type of shortening is very common. For example: What you just said is a good idea. That’s a good idea. Good idea!

WAY TO is often used as an expression of approval or a compliment. The most common is WAY TO GO. IF you look this up, it should give you a better understanding. WAY TO THROW A PARTY; Way to bake a cake! Way to ace that exam! So, "Way to state the obvious," is a sarcastic way (i.e. a compliment that's not really a compliment) of telling someone they are saying something that is obvious.

Thanks Dan