Another thing I mention on this site once or twice a year when I give a "scuba diving" response to questions posted on here. The surface water visibility is not always an indication of the visibility of the rest of the water column.

I'm seen a variety of conditions while scuba diving the Lake. I've seen clear surface water (15 foot+ vis) that turned to 6-8 foot mid depth and was only 3-4 near the bottom. I've seen surface vis at 6-8 that cleared up to 12+ mid depth and near the bottom. I've seen 4-5 vis at the surface and 10+ at the bottom. 6-8 at the surface, 4-6 mid-depth, and near zero at the bottom. And consistent visibility from surface to bottom. There is a lot of variety throughout the season and location.

Remember that surface visibility is not always a tell tale of what the rest of the water column visibility is.

That being said, if you can link surface visibility to catch success, then there is a connection and that helps put walleye in the box.