By James Glynn and James Ramage 

The Australian dollar rose to its highest level in two weeks against the U.S. dollar and the yen Wednesday after inflation data dented investors' expectations that Australia's central bank would cut interest rates before 2015.

The Aussie, as the currency is called, climbed 0.7% against the dollar, to $0.9457, while it gained 0.7% versus the yen to ¥95.99, marking the strongest levels against both since July 10.

Consumer prices in the second quarter rose 0.5% from the first and increased 3.0% from a year earlier, the Australian Bureau of Statistics reported Wednesday. Core inflation, which strips out extraordinary events such as the price effects of extreme weather or new taxes, rose 2.8% from a year earlier, putting it close to the top of the central bank's 2% to 3% target.

The uptick in inflation lowers expectations for the Reserve Bank of Australia to cut the country's cash rate, which sits at 2.5%, the second highest among developed markets behind New Zealand, at 3.25%. The high interest rates have made the currencies popular with investors who can borrow money at a lower rate in the U.S. and Japan, exchange the currency and then invest it in Australia and New Zealand.

"Vocal opposition to the strength of the Aussie has been toned down recently," said Omer Esiner, chief market analyst at the currency brokerage Commonwealth Foreign Exchange Inc. "And coupled with the higher CPI reading, it limits the risk for an RBA rate cut by year-end."

The RBA cut interest rates to a record low 2.5% almost a year ago to buttress the economy against falling mining investment and a rise in unemployment. So far, the tonic has helped house prices rise sharply. But since the central bank's rate cut on Aug. 7, the Aussie has gained 5.2% against the greenback. A strong Australian dollar and falling commodity prices are acting as brakes on growth.

Many economists believe Australia's economy will recover more broadly in 2015. "Interest rates are on hold for the time being, but we still see higher rates next year," said Kieran Davies, chief economist at Barclays Australia.

In other activity, the dollar gained 0.1% against the yen on light trading, to ¥101.52, while the euro remained unchanged, at $1.3461.

-- Write to James Glynn at james.glynn@wsj.com and James Ramage at james.ramage@wsj.com