Rating agency Standard & Poor's is giving Greece a one-in-three chance of leaving the euro-zone, which would probably lead to another sovereign default by the Mediterranean nation.
The kiwi dollar was buoyed by a rebound in dairy prices in the latest GlobalDairyTrade auction. Prices surged almost 14 per cent from a three-year low on Fonterra Cooperative Group's online trading site.
"A solid overnight global dairy auction result should help to deliver more support for the New Zealand dollar on downside moves," Sinton said.
The New Zealand dollar rose to 77.60 Australian cents from 77.47 cents before the release of Australia's first-quarter gross domestic figures this afternoon.
The Reserve Bank of Australia cut its target cash rate by 25 basis points to 3.5 per cent yesterday as deteriorating global sentiment keeps interest rates expectations low.
Australian employment numbers are also set for release on tomorrow.
New Zealand figures out today include the Government financial statements for the 10 months ended April 30 and the March quarter's value of building work, followed by the wholesale trade survey from Statistics New Zealand on Friday.
The New Zealand dollar rose to 60.71 euro cents from 60.52 cents yesterday and increased to 49.15 British pence from 48.88 pence. The kiwi climbed to 59.53 yen from 59.40 yen.