An airfoil includes an airfoil section that has an airfoil wall that defines a convex leading end, a trailing end, and first and second sides that join the convex leading end and the trailing end. The first and second sides span in a longitudinal direction between first and second ends. The airfoil wall circumscribes an internal core cavity. An arced rib is disposed in the internal core cavity and arcs toward the convex leading end. The arced rib and the convex leading define there between an arced cavity. An arced baffle is disposed in the arced cavity.