If the wave is at least 20-30 meters away, you should be able to use 2 cameras side by side and trigger them by a remote or even a cable release.
The difficult part is to align them correctly (allowing for 20-35 degrees overlap. The safest method would be to mount both cameras on some solid rig and do the alignment using some object on the beach, roughly the same distance as the intended distance to the wave and then turn the entire rig towards the waves.
If you can rent Roundshot VR Drive panoramic head, that one has a speed mode which allows shooting at high shutter speeds (without stopping the rotation after each exposure) while the camera turns.
However, the simplest option for an action shot in panoramic format would be a 6x17 panoramic 120-film camera. One camera, one shutter click, no parallax error, no stitching needed.