In the fall and spring when it's warm but not hot you can catch them during the day, sometimes well. I hit a bite in May of 2002 that was a daytime bite. I caught and released about 25 walleyes from 11" to four pounds during the day on Cordell Super Spots and Rapala Tail Dancers. The Twighlight bite was a fish on basically every cast. I kept my five fish limit of walleyes, all 12 - 15 inchers.
The same October I enjoyed good fishing from shore using the same lures and also nightcrawlers under a slip bobber. But most other times, your window of opportunity is mainly the twighlight periods. Walleyes just don't stay shallow in hot weather. You would need a boat and be able to jig deep or troll with deep running cranks. And never forget good old bait. Lots of times when you locate the fish, you just can't beat it. Nightcrawlers, minnows, leeches, crawdads.
Tyler