Onetangi Sports Park is a park in the beachside settlement of Onetangi on Waiheke Island, and it holds a 5.0 Google rating.
A good sports park is the flat ground a community builds its weekends around — marked fields for the winter codes and space left over for a casual kickabout. On Waiheke that matters more than most places: the island is steep and scrubby, level grass is scarce, and grounds like this tend to act as the neighbourhood's village green as much as its playing field. Expect the basics rather than city facilities, and if you need a full field for a proper game, check whether a local club has it booked. Ferry arrivals should plan the bus trip out from Matiatia and bring their own ball and water, as island shops keep short hours.
On Waiheke, where level ground is hard to come by, a 5.0 rating suggests the neighbourhood knows what it has here.