Wineera was born and raised just outside of Hamilton, New Zealand in the small town of Temple View. He is the youngest of 4 children and his twin brother Arawa also plays flanker for The Warriors. Win has played alongside his twin all his life at CCNZ, Highland and thenat BYU. Win served an LDS mission in St Louis, Missourri, and then moved to Provo to study Exercise and Wellness. Win is married to wife Tenealle, and they have a daughter Naia.