Knowing that walleye prefer dark, shadowy conditions can pay huge dividends when you fish for them on bright summer days. Early in the morning, you can catch them on top of underwater points or submerged reefs, for example, but once the sun rises higher, switch to whichever side of the structure is shaded.
Indeed, always monitor the sun, and fish on the dark, shady side of any structure or cover, even when it’s 25 or 30 feet deep. When you do this, you can often track the fish while they slowly follow the shade line around the structure as the sun progresses overhead. It gives a whole new meaning to the expression “Come over to the dark side.”