Using light jigs with a white twistertail and a piece of worm, Walleye gullet, leech, live minnow or salted minnow works best. This is the most popular way to catch high numbers of Walleyes.
In the summer the walleyes go a little deeper, hang out at the mouth of rivers or lay off rocky points. Islands that have patches of gravel around them are good spots. Rocky drop-offs are also good. With lakes that have a flat structure, the Walleyes will head into the thick weeds to get protection from the sun.
In the summer, Walleyes tend to go after more natural colors like silver, brown, black and white. When fishing with jigs, you can go to a heavier jig like a 3/8-oz or even 1/4-oz depending on how deep you are fishing. The unscented twistertails or rubber you put on the jig should be these natural colors. Fish in the north do not like scented rubbers. They do like salted rubbers. Live minnows, if allowed, are excellent whether on a jig or just a strait hook. If you are on a lake where you cannot use live bait, get some salted minnows. We use to catch minnows and then cure them with salt. It seems a little cruel but it's convenient and the Walleyes go nuts over them. Just put a bunch of minnows on a cookie sheet and cover them with a generous amount of table salt.
Hot Days: Some times the Walleyes get very lazy in the summer, especially if it's a hot sunny day. Use a 1/8-oz jig and put a white unscented twistertail on. Then cast out and literally drag the jig across the bottom. Give it tiny little jigs (2 or 3 inches) once in a while just to shake off any mud or weeds. This bottom dragging gets the Walleyes feeding. It really works. You should always jig slowly. Just make the jig motion longer in the morning, as the Walleyes are more aggressive. Sharp quick jigs will attract pike. In the afternoon when the Walleyes slow down, put a piece of worm, Walleye gullet or salted minnow on your jig and use the slow bottom drag methed and you will start hitting Walleyes again.
Trolling off the rocky points with a Rapala or Thunderstick is also good in the summer. Natural colors like silver or brown seem to work best. If you use bright colors, you will hit tons of pike. In the summer, the Walleyes tend to go a little deeper and stay off rocky points or rocky drop-offs because wave action on the rocks creates more oxygen. Also, bugs and other food floating on the surface tend to get more dense when drifting past a point so small minnows show up to feed and the Walleyes feed on the minnows.