Surf in the midwest? Sure!
Since 2014, It has been possible to catch a wave at a municipal water park in Kansas City, Missouri. The Bay Water Park, part of Kansas City Parks and Recreation has a simulator called the BayRider. It generates a thin sheet of water that flows over a stationary wave form. The resulting “wave-like” shape permits ride to slide down, carve a turn, and ride the wave surface emulating the maneuvers of surfing or other board sports.
However, since school is back in session, the water park has limited hours through Labor Day (check the Web site for more information), so if you want to hang loose, check out this list of National Park Service locations where you can plan your next surfing vacation.