According to the latest rainfall statistics, there has been more than 1080mm of rain at the Takapau Plains recording station this year.
In September there had been 171mm, almost three times the September average.
Rain or showers are forecast throughout Hawke's Bay every day for the next week, with a "heavy rain watch" notice issued on Friday by MetService for the area north of Napier, for the 18 hours from 1pm Friday until 7am Saturday.
MetService warned of periods of heavy rain which could approach "warning criteria," posing prospects of a wet Friday night's NPC rugby match at McLean Park, Napier.
Heavy rain is expected on Saturday for Hawke's Bay Racing's Spring Racing Carnival in Hastings.
Problems are also now being predicted for the food chain, with Federated Farmers Hawke's Bay provincial president Jim Galloway saying pea planting is already more than three weeks behind schedule.
The ground had become so wet there is "just nowhere for it to go", he said, highlighting that there was 30-40mm in a day last week, and adding: "The water levels came right to the top. We wouldn't want that again."