Scene Capture 2D - Clipping Plane

I’m working on an ocean shader and to implement proper planar reflections, I would like to have a Scene Capture 2D actor below the water mirrored to the player above it and then use the rendered image as a reflection on the surface. However, for proper reflections, I need this to only render what’s above the water surface. In other words, I want to set the camera’s frustrum clipping plane to be the ocean’s surface.

Any ideas how I might go about this?