WHS beat Heretaunga College 37-18 before falling to Samuel Marsden 24-30.
Meanwhile, Cullinane bounced back from a 21-54 loss to St Mary's Wellington to beat Inglewood High School 34-32.
Wanganui Collegiate beat Feilding High School 27-11 in their early game and had one more to play in the day's final round.
In the B grade, Nga Tawa, Rangitikei College, Wanganui City College, Wanganui Girls College and a Whanganui High School invitational team are the local teams competing.
Nga Tawa had the best day winning both their games; 27-21 against Lytton High School and 46-6 against Awatapu College.
Wanganui City College the only other local side to get a win in the B grade edging out Stratford High School 31-25.
The tournament runs until Friday.