The Junior Football Ferns led 17-0 at half-time at the Oceania Under-20 Women's Championship in Nuku'alofa, with striker Emma Rolston scoring 11 goals before the break.
Coach Leon Birnie's side again underlined their strength at the Loto-Tonga Soka Centre as eight further goals came in the second half.
Grace Jale and Paige Satchell each scored hat-tricks while captain Jasmine Pereira scored six.
Goals to substitutes Jade Parris, Michaela Robertson and Isabella Richards completed the scoring.
The Ferns thumped Tonga 15-0 first up on Thursday.