Ocean peak season is far from over.
Ocean peak season is far from over. Cargo volumes at major U.S. container ports continue to climb, positioning September to become the busiest import month of the year, according to the Global Port Tracker report published Sept. 9 by the National Retail Federation and Hackett Associates. For importers, buyers, shippers, and freight forwarders, the extended peak carries direct implications for landed costs, inventory planning, and delivery reliability heading into the holiday quarter.
Analysts had expected the surge to taper off. Earlier frontloading, driven by shippers moving cargo ahead of shifting tariff policies and fuel cost concerns, was projected to pull demand forward and trigger a steady decline through the second half of the year. An Aug. 7 Port Tracker update anticipated high August volumes followed by a downward slide.
The volumes never slid.
"We thought the peak season would be mostly behind us by now, but that's not the case," said Jonathan Gold, NRF vice president for supply chain and customs policy. The forecast now points to sustained strength, giving cargo owners a narrower window to secure capacity and lock in transit schedules before rates and space tighten further.
Two disruptions have reshaped the flow of goods and pushed volume later into the calendar. Recent typhoons in China delayed departures and shifted sailing schedules, redistributing cargo that would otherwise have moved earlier in the summer. At the same time, shippers rerouting away from the Panama Canal, in response to persistent drought concerns affecting transit capacity, have altered established routing patterns, Gold noted.
For freight forwarders and shippers managing multimodal networks, these shifts underscore the value of real-time visibility and adaptive routing. Disruptions of this kind reward operators who can reallocate capacity quickly and keep clients informed before delays cascade into missed commitments.
The Global Port Tracker forecasts September at 2.31 million TEU, a 9.6% year-over-year increase. That figure would cap a remarkably resilient stretch for U.S. gateways. Imports are then expected to ease in October, projected at 2.11 million TEU, a 1.7% year-over-year decline, signaling that the extended peak, while durable, is not indefinite.
The Port of Los Angeles clearly illustrates the momentum. The port processed 955,907 TEUs in August, running 6% above its five-year average and concluding the busiest three-month stretch in its history. That performance reflects durable consumer demand and early holiday shipments moving through the nation's largest container gateway.
Consistent consumer spending underpins the volume. "Retail sales remain strong, and cargo is moving relatively smoothly, although there are reports of vessel delays and increased times required for cargo to move through the supply chain," said Ben Hackett, founder of Hackett Associates.
That balance, strong demand paired with generally functional freight movement, is encouraging. Yet the noted vessel delays and longer transit times deserve attention. For importers focused on total landed cost and cash flow, extended transit windows can tie up working capital and compress the margin between arrival and shelf.
The extended peak season is more than a scheduling footnote. It signals cargo owners to reassess inventory timing, confirm customs readiness, and align with logistics partners that deliver dependable transit and clear shipment visibility. Businesses that plan around the sustained volume, rather than assuming an early wind-down, position themselves to protect margins, meet customer commitments, and enter the fourth quarter with cargo where it needs to be.
Peak season is enduring. The operators who prepare for it, rather than react to it, will move through the closing months of the year with the greatest confidence.
