WHS ended the low scoring match with 84, losing just five wickets in the process.
The victory was WHS' third over Collegiate in the Wanganui regional final of the Gillette Cup national series after beating their arch rivals in the 2008/9 and 2009/10 seasons before yesterday.
WHS will now play the winner of the upcoming match between Francis Douglas College and New Plymouth Boys High and the victor from that game will progress through to a Central Districts regional final in Palmerston North.
Safely through those games WHS has the chance of claiming the Gillette Cup itself at the national finals in Christchurch in December.