Looking at the photos the CG and centre of buoyancy would be close together so odds are it floated flat down with a significant proportion submerged. The effect of wind will surely be whatever effect the wind has on the top few inches of the water, ie how the surface of the water moves relative to the body currents rather than direct wind effect on the body. Doesn't sound prone to accurate calculation given the variation over time and space. However at least we know it floated on account that it didn't sink. If by some circumstance I can't imagine, it floated feet below the surface then I can't see why it would make it to the beach rather than be grounded as the bed shelves.