Imports fell 1.2 per cent, while exports were down 1.0 per cent. Canada's trade deficit, meanwhile, narrowed slightly to C$2.45 billion ($1.85 billion), missing analyst expectations of C$2.0 billion.
Statscan revised July's trade deficit to C$2.53 billion from an initial C$2.45 billion.
"The slowdown in trade showed up earlier than we had anticipated, and the drop in export volumes suggests that the recovery's momentum could have slowed more than anticipated in August," said Royce Mendes, senior economist at CIBC Economics, in a note.
Lower imports of aircraft and other transportation equipment and parts drove the import decline, while exports fell after three months of strong gains on lower exports of passenger cars and light trucks, Statscan said.
Imports from Canada's largest trading partner, the United States, fell 1.6 per cent, while exports to that country were up 1.0 per cent on higher lumber exports. Exports to all countries remained 7 per cent below pre-pandemic levels, while imports remained down 5.1 per cent, Statscan said."Overall, the fact that we haven't fully recovered in the merchandise side is a disappointment," said Ross Prusakowski, principal economist at Export Development Canada.
Prusakowski noted that some of the export weakness was temporary, pointing to a strike at the Port of Montreal in August that had an impact on shipments, particularly to Europe."That's one area where we think there might be some strength coming back," Prusakowski said.
Analysts also noted that a July boost caused by shorter seasonal shutdowns at most auto assembly plants did not continue into August, returning trade in that segment to more typical levels.
Still, export levels of passenger cars and light trucks were almost C$200 million higher than in February, Statscan said.
The Canadian dollar was trading nearly unchanged after the data at 1.3260 to the greenback, or 75.41 U.S. cents
 "Covid-19 crisis: Canada’s exports, imports fall 1% in August, shows data")