Outlook for economic activity slightly more upbeat

Westpac economists expect 0.3 per cent growth over the year to June and a contraction in spending. (Dan Himbrechts/AAP PHOTOS) (AAP)

Prospects for Australia's growth are looking slightly more optimistic, although a top economist warns of weaknesses.

The economic outlook took on a brighter hue in June, according to several domestic and international data points tracked by Westpac and Melbourne Institute, but is still pointing to below-trend economic growth.