* Subject-verb agreement: "It" is singular, but "werent" is plural. It should be "wasn't."
* Double negative: "Werent no" is a double negative, which is grammatically incorrect. You should use "wasn't" or "was not."
* Misspelling: "New" should be "knew," and "wood" should be "would."
Here's the corrected sentence:
It wasn't any surprise that you knew he would do it.
This sentence is grammatically correct and makes sense.