"The market appeared to be pre-positioning itself for a more balanced RBNZ in today's speech, as opposed to a bank that will show an aggressive easing bias," Kymberly Martin, a strategist at Bank of New Zealand, said in a note.
"We would concur with this view, although we still see the RBNZ delivering at least one more 25 basis point rate cut and most likely two, taking the OCR back to 2.50 per cent."
She said traders are ready to sell the kiwi if it rises as high as 67.70 US cents and Bank of New Zealand's medium-term view is for renewed weakness in the currency.
With Wheeler's speech out of the way, attention will turn to the US Federal Open Market Committee deliberations, due out tomorrow, which may provide further clues to the timing of rate hikes by the Federal Reserve.
The kiwi gained to 91.06 Australian cents from 90.98 cents late yesterday.
It traded at 82.36 yen from 82.33 yen and gained to 60.29 euro cents from 60.13 cents.
The currency was little changed at 42.71 British pence from 42.77 pence.