Wai Kai's standing wave sits inside a lagoon resort on Oahu's west side and uses CityWave technology to pump out a face about 100 feet wide—built to be the biggest machine-made wave anywhere. Dividers let it split into smaller sections for lessons or open into one long, point-break-style ride, and former pro surfer Shane Beschen helped shape that design. Unlike the North Shore, it doesn't go flat or blow out, so sessions run on schedule rain or shine. It opened in 2023 with a full resort of food and amenities around it, making it Hawaii's most reliable wave, man-made or otherwise.