Is this wrong?

It's not wrong, and it is possible. It's not easy, but it's not impossible.

There's a link about being a Christian Wiccan, and there's a Tumblr user whose blog is about being a link. (Which isn't the same thing as being a Christian Wiccan, but they have a lot of the same problems when it comes to syncretism, so it's still a useful resource.)

i guess it's possible to be both but even if you do decide to be both, it's more like a new religion all together as in, you are not fully catholic and you are not fully Wicca so you can never expect to be fully accepted by the Catholic religion, i don't know what the Wicca religion is inclined to accept, i won't tell you if this is right or wrong, because in my opinion right and wrong is merely perception (most of the time) at least, it's okay to be very spiritual and many times it can help you along life's cruel paths, it helped me a lot when i was Christian. You don't have to be Catholic or Wicca, you can simply embrace the beauty of both beliefs, or hold on to one belief more strongly but still like ideas or concepts from the other, or if you desire a sense of stability it might be best to choose one, or you can create your own belief system all together which is what many people do, i don't have a problem with any of them and don't see them as wrong, so which ever choice you make make sure it's what will make you happy ^ ^ good luck! :D

Try Unitarian Universalism

I'm a wiccan myself but don't worry.
There are many Catholic Wiccans around the world.