* Q1 GDP up 1.0 pct q/q vs +0.9 pct consensus
* Q1 GDP +3.1 y/y vs +2.8 pct consensus
* Australian dlr jumps after data, up 0.6 pct at $0.7659 (Adds detail, analyst comment)
SYDNEY, June 6 (Reuters) - Australia's economy grew at the fastest annual pace in almost two years as it entered its 27th year of growth without a recession, but uncertainty over household consumption and global trade dimmed the outlook for future growth.
Gross domestic product (GDP) expanded by 1 percent in the first quarter, from an upwardly revised 0.5 percent in the December quarter, data from the Australian Bureau of Statistics showed on Wednesday.
Annual growth jumped to 3.1 percent from the December quarter's 2.4 percent.
The result just beat market forecasts of growth of 0.9 percent for the quarter and 2.8 percent on-year, pushing the local dollar up a quarter of a cent to $0.7665.
The Reserve Bank of Australia (RBA) had sounded upbeat about future economic growth after its policy meeting on Tuesday but kept interest rates steady at 1.5 percent in anticipation of a gradual revival in inflation.
Investors suspect interest rates will stay on hold for a long time to come: Interbank futures are not fully priced for a hike until September 2019.
A bumper run in exports was the main driver of the first-quarter acceleration, accounting for half the growth in GDP, while government spending and non-mining investment also helped.
Household consumption - which accounts for around 57 percent of GDP - contributed 0.2 percentage point to growth in the quarter.
However, there was caution around reading too much into the quarterly numbers.
"While recent data does point to an acceleration in March-quarter GDP growth, there have been numerous growth spikes in Australia to around 1 percent, quarter-on-quarter, in recent years only to be followed by a cooling again," said Shane Oliver, chief economist at AMP.
"Uncertainty remains around the outlook for consumer spending: Household debt is high, banks are tightening lending standards, wage growth and inflation remain low and will pick up only gradually, and house prices are falling," Oliver added.
Household spending on insurance, transport, health care and utilities grew the most while spending on alcoholic drinks, cigarettes and eating out dropped, the data showed.
Some of that spending had to be funded by reduced saving, with the savings ratio falling to 2.1 percent from 2.3 percent. (Reporting by Swati Pandey; Editing by Kim Coghill and Eric Meijer)