The world's third-busiest container port handled 1.94 million TEUs last month, the highest monthly throughput since October last year, the South China Morning Post reported.
It represented a 0.3 percent increase on July, while the year-on-year drop of 10.7 percent was the narrowest of the past nine months.
The year-on-year decline in Shenzhen's container throughput was 11 percent in August, a substantial improvement on the 20.4 percent decline for the first eight months of the year.
Throughput at Guangzhou rose 26 percent year on year, a turnaround from the 7.5 percent decline for the first eight months.
Hong Kong and Shenzhen are the two main ports serving the Pearl River Delta, dubbed the "world's factory" for shipping much of the mainland's exports to its main markets of the United States and Europe.
US retail sales increased 2.7 per cent to US$351.4 billion last month from July, better than the 1.9 percent monthly growth economists had expected.
Although global data points to a recovery in world output in the second half, the upbeat figures mask weak underlying global demand, warned a report by British economic think tank Lombard Street Research.