"The kiwi is clearly suffering from pre-OCR nerves so the pressure remains. The market is fully expecting Governor Wheeler to cut by 25 basis points and come out with a dovish statement afterwards.
"The market is very much focused now on this growing El Nino effect. There does appear to be a growing momentum behind that at the moment. It's a negative for the country. That means that the kiwi dollar remains under pressure."
OMF's Ive said the potential for drought is likely to be "on the radar" of the Reserve Bank and could be raised as a concern on Thursday.
The kiwi has support at 62.35 US cents and faces resistance at 62.80 cents, Ive said.
In New Zealand today, data is released on second-quarter manufacturing, which will help economists firm up their expectations for GDP over the period.
This afternoon, all eyes will be on Chinese August trade data. Weak import data would probably weigh on the kiwi and the Aussie, Ive said.
The New Zealand dollar slipped to 90.28 Australian cents from 90.54 cents yesterday.
In Australia today, the NAB August business confidence survey is published and Reserve Bank of Australia head of financial stability Luci Ellis is speaking on 'Property Markets and Financial Stability' in Sydney.
The kiwi fell to 56.03 euro cents from 56.24 cents yesterday ahead of the release of the second estimate of Eurozone GDP.
The local currency declined to 40.96 British pence from 41.25 pence yesterday, edged lower to 74.66 yen from 74.84 yen, and dropped to 3.9822 yuan from 3.9905 yuan.
See live rates for the NZ-US $ below