Exports rose 2% in August from a year earlier to $40.34 billion, the Ministry of Finance said on Wednesday, a historic high for the month and up for the 26th consecutive month.
That was, however, much slower than the 14.2% rise recorded in July, and below a forecast for a 9.5% increase in a Reuters poll.
The ministry said technology demand fuelled the growth, but added that consumer spending was gradually slowing due to global inflation pressure and monetary policy tightening, citing "more conservative purchasing intentions by manufacturers".
Exports to China, Taiwan's largest trading partner, fell an annual 9.9% to $15.12 billion in August, after a 3% expansion in July, in a demonstration of the economic problems there.
China's exports and imports lost momentum in August with growth significantly missing forecasts as surging inflation crippled overseas demand and fresh COVID curbs and heatwaves locally disrupted output.
Overall, Taiwan's exports of electronics components in August rose 12% to $17.05 billion, with semiconductor exports jumping 14.3% from a year earlier.
Many companies expect global chip shortages to last at least for the rest of the year, which will continue to bolster Taiwanese semiconductor firms' order books even as demand for some consumer electronics weakens.
Taiwanese chipmaker United Microelectronics Corp (UMC) on Tuesday reported a 34.9% on-year surge in August sales.
Firms such as TSMC, the world's largest contract chipmaker, are major suppliers to Apple Inc and other global tech giants, as well as providers of chips for auto companies and lower-end consumer goods.
Fitch Ratings said on Wednesday that while external demand for Taiwan's high-tech exports was likely to fall, it should also "stay robust".
The finance ministry warned of uncertainties ahead because of high global inflation, Russia's invasion of Ukraine and the "China-U.S. technology war", even as it expected sustained chip demand.
Ministry official Beatrice Tsai said trade during the busy season, traditionally the months leading up to Christmas, would probably not be as strong as previous years.
August exports to the United States were up 2.3%, much slower than the 24.8% jump recorded the previous month.
Taiwan's August imports rose 3.5% to $37.35 billion, also a record high for the month but worse than economists' expectations of a 7.1% increase, after a jump of 19.4% in June.
Taiwan could see September exports in a range of a 3% contraction to a 1% expansion from a year earlier, the finance ministry said.
(Reporting by Emily Chan and Ben Blanchard; Editing by Ana Nicolaci da Costa)