The Ministry of Health has announced 388 new cases in the Whanganui District Health Board region for Wednesday.
The number is slightly down from the daily high of 399 reported on Tuesday.
There were 20,087 new community cases in New Zealand on Wednesday.
Whanganui DHB chief executive Russell Simpson said modelling provided to the DHB suggested cases numbers would spike in the next two weeks.
"If we continue to track upwards over the next couple of weeks, that is in line with what the modelling has been suggesting. There is nothing out of step with what the modelling has suggested.