My uncle got 2 20lb plus fish on a local beach in the Manawatu 2 years ago. One was 21lb gutted. His mate got an 18lber the next day and a 16lber the same day. The next day the same guy got a 23lber I believe it was. All 4 were in the same place and all off the beach in the middle of a blazing hot day in early April. They got no 20lbers last year that I know of, but plenty of "teens".
I'm still looking for a decent one off the beach. Then again, you have to go fishing to do that. Gary, you want to send me a pm and give me some better directions to that spot? I have been getting some handy tips from a local.