Rudings expects the kiwi will decline to 81 US cents by the end of July as a revival in the US economy underpins the greenback.
The New Zealand dollar touched a fresh six-month low of 90.55 Australian cents overnight and was trading at 90.64 cents at 8am from 90.73 cents at 5pm yesterday.
Today, traders will be eyeing a report on Australia's trade balance for April.
Better-than-expected first quarter growth figures in Australia yesterday helped underpin the Aussie as investors change their bets on the currency's direction away from 'short' positions, which anticipate a currency will decrease in value, said OMF's Rudings.
"The market has been 'short' for a long time and from early this year they have unwound all their 'short' positions in the Aussie but they haven't really got any 'long' and I think we might be seeing the market going from 'neutral' Aussie to slightly 'long'," he said.
Rudings says the kiwi is unlikely to fall below 89 Australian cents as the local currency will remain supported by a likely increase in interest rates at the Reserve Bank meeting next week.
The New Zealand dollar advanced to 61.85 euro cents from 61.79 cents yesterday ahead of the European Central Bank meeting today where further stimulus is expected.
The kiwi was little changed at 50.25 British pence from 50.29 pence yesterday, and at 86.41 yen from 86.35 yen.