"Increased speculation of RBNZ rate cuts appears to have been a key contributor to the weakness."
The BNZ says that while the chance of rate cuts has risen, it sees the hurdle to cutting rates as "quite high" and says a cut at the next meeting is "highly unlikely".
Traders are now looking ahead to the Reserve Bank's release of its six-monthly Financial Stability Review tomorrow.
The New Zealand dollar could weaken further should the bank signal it is progressing with plans to try and dampen the bubbling housing market through macro prudential measures, potentially paving the way for it to cut rates.
The New Zealand dollar touched 92.82 Australian cents, its lowest level since late January, as traders price in more rate cuts ahead for New Zealand and pull back on their expectations for further rate cuts in Australia.
The kiwi was trading at 92.93 Australian cents at 8am from 93.51 cents yesterday ahead of the Australian Federal budget announcement tonight.
The local currency dropped to 47.06 British pence from 47.88 pence yesterday, touching a four-year low of 47.01 pence overnight, as the pound strengthens following the return of the Conservative government in last week's general election.
The kiwi slipped to 88.15 yen from 88.50 yen yesterday and declined to 65.79 euro cents from 66.21 cents.