Awakino and Mokau
You can fish for kahawai at either the Mokau or Awakino river mouths, and for snapper and gurnard from the beach (we can point you in the right direction). There's also great kite or Kontiki fishing, with large snapper landed for those who know where to go.
Mokau township (5 minutes from Awakino) has a fishing club, and you can find plenty of information there.
Even when you get away from the river mouths, the west coast has a lot of good fishing opportunities. The old motor camp was once home to a record snapper catch.
Marokopa / Kiritehere
If you can get across the Marokopa river and are willing to walk, there is good surf fishing around the Marokopa / Kiritehere area. Between the two beaches can bring rewards but it's important to watch the tides as you can't get back around the mouth at high tide.