You won't find any in-wall (hardwired) outlet where both halves are switchable, at least not in the US. At least one is required to be powered if the circuit is powered so someone doesn't think the power has been cut just because neither has power (e.g., if they're about to replace the outlet), or at least I assume that's the reasoning. So, you'll find duplex outlets with only one that is remotely controllable for that reason.
There are outdoor plug-in units that have two controllable outlets, but it sounds like that's maybe not what you want. If it is, Eva Logik has one that I bought recently since it's all I could find in stock. Inovelli used to and may again (and this could be one of the sore spots they have with their OEM giving others their former product, so sorry guys, but it's all I could find!).
For something "in-wall" (or "in-box"), I'm not sure. I've seen people suggest you can use a "regular" in-wall Z-Wave outlet outside, as long as it's covered by a weather box like any outlet should be anyway. But popular ones I just looked up now explicitly state "indoor." I'm also pretty sure outdoor outlets are required to be GFCI regardless, however, which is also something you won't find built in to any Z-Wave outlet, so that criterion alone (unless it's downstream from another GFCI) would already make this a difficult request.