Duke Kahanamoku OceanFest: Keiki Kokua Surf Fest on Sunday, August 23, 2026 at Kuhio Beach, Waikiki (Outdoors). Cost: Free to watch from the beach. Best for: preschool, school-age, tween. Adaptive keiki surf day at OceanFest in Waikiki — volunteers get kids into the water on tandem boards. The most