Its container throughput for March 2008 hit 421,637 TEUs, the highest ever achieved in a single month to date.
With the early jump in throughput, Westports expects to achieve its target of five million TEUs by year-end.
The port's handling of local containers during the January-March 2008 period grew to 351,624 TEUs from 266,693 TEUs in the same period last year, up 32 percent.
Transhipment cargo hit 730,101 TEUs, a 13.6 per cent growth from 644,449 TEUs recorded in the corresponding period last year.
Westports' total container volume last year was 4.3 million TEUs, of which 1.3 million were local boxes.