The Rugby World Cup is expected to have propped up growth in recent months, but the euro zone debt crisis is still weighing on the economic recovery.
Gross Domestic Product figures are released on Thursday, while data on the country's international dealings, the balance of payments for the June quarter, are due out on Wednesday.
The economy barely grew in the June quarter, expanding just 0.1%, compared with 0.9% growth in the previous quarter.
Most economists are expecting growth of about 0.6% in the September quarter.
Westpac chief economist Dominick Stephens said that, setting aside the effect of the Rugby World Cup, growth was patchy. The good year for the agriculture sector was flowing through to the manufacturing sector, but construction and wholesale trade was weak.