The Confederation of British Industry (CBI) released its retail sales balance data on Wednesday. The CBI retail sales balance increased to 24% in August from 21% in July.
The increase was driven by a rise in sales in clothing stores.
Sales expectations for next month were up to 35%.
"Household spending seems to have remained firm going into the second half of this year, so the outlook for the retail sector looks upbeat," CBI Director of Economics, Rain Newton-Smith, said.