The sector is now expected to receive $3.5 billion to $4 billion more in revenue compared with 2012/13. A 30c revision announced last week will add about $500 million to dairy sector revenue this year.
Fonterra has been in damage control mode since China placed a temporary suspension on dairy imports thought to contain bacteria that can cause botulism.
The scare damaged New Zealand's farming reputation and cast doubt on the quality of our dairy products.
ASB chief economist Nick Tuffley said the forecast reflected recovering global dairy prices and resilience following the botulism scare.
New Zealand still had a lot of work ahead to restore long-term damage to reputation. But as the supplier of 90 per cent of China's imported milk powders, it was "pretty hard for China to suddenly turn around and import product from elsewhere", he said.
The $7.80 price was $2 more than the previous season, and a "really good" windfall for dairy farmers.
"When you combine that with a probable slight lift in production, we're looking at an increase in farmgate revenue of upwards of $3.2 billion."
However, rough times during the drought meant many farmers would be reinvesting the windfall back into their farms, rather than spending it.
"We're not going to see farmers rushing out and celebrating with retail therapy."
A third of the money would trickle down to the economy, and the rest would go into getting the dairy industry back into good shape, he estimated.