Lemamea was born in Apia. His first international cap was during a match against Ireland, at Lansdowne Road, on 29 October 1989. Although he was not present in the 1991 Rugby World Cup roster, he took part at the 1995 Rugby World Cup, playing two matches. His last international cap was during a match against Tonga, at Nuku'alofa, on 8 July 1995.
