Port and inland delays across Asia, combined with sustained US-bound import volumes, are extending the trans-Pacific peak season beyond its typical August-to-October window, according to a Journal of Commerce report.

The combination of Asia-side bottlenecks and front-loaded import demand has compressed effective capacity on the Asia-US West Coast and Asia-US East Coast lanes at a time when carriers had expected demand to begin softening. Lines, forwarders, and beneficial cargo owners now face a peak window that shows little sign of closing on schedule.

What is extending the peak?

Asia-side congestion sits at the center of the pattern. When origin ports, rail terminals, or trucking networks slow, vessel schedules slip, equipment rotations stretch, and the container flow that normally thins after mid-October keeps arriving at US destinations through November and into December.

Import strength adds the second pressure point. US retailers replenishing inventory for the holiday season and manufacturers pulling components forward have kept booking activity elevated. When demand stays strong while effective capacity — the usable slots on each sailing, after delays and skipped ports — stays flat, the result is sustained upward pressure on trans-Pacific freight rates.

How does this change the commercial picture?

For shippers, the longer peak narrows the shoulder periods when spot rates typically ease. A BCO that locked in an annual service contract at favorable terms may see the spot premium over that contract widen as peak-season surcharges, GRI rollouts, and congestion-related fees extend across more weeks.

For ocean carriers, the cycle offers a longer revenue tail. Lines that have added sailings, swapped vessel strings, or rotated capacity onto trans-Pacific strings can capture demand that, in a normal year, would have rolled off by late October. Alliance partners have more room to defend rate levels, and the incentive to discount fades as long as the demand holds.

For forwarders, planning gets harder. Equipment availability at Asia load ports, GRI timing, and the schedule reliability of each sailing all become more volatile inputs. Forwarders that locked space at flat rates with carriers now face the prospect of those allocations drawing on a stretched peak calendar.

What should shippers watch over the next four to six weeks?

The trajectory depends on whether Asia-side congestion clears before the holiday cargo push ends. The signal shippers should track is rotation discipline at the largest Asia load ports and the spread between announced GRIs and the spot rates carriers actually accept.

If delays persist into late November, expect a second wave of peak-season surcharges on top of the round already in market, and prepare for rolled cargo, vessel omissions, or skipped port calls on the Asia-US East Coast trade.

If delays ease, the peak should still run later than 2024 but normalize by early December. Either way, carriers enter the new year with rate levels supported by a peak that ran longer than the trade expected.