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Vessel Bunching at Seattle-Tacoma Eases Slightly as Berth Wait Times Drop to 1.5 Days

By ANKPOST Research · 2026-05-28

Average berth wait times at Seattle-Tacoma terminals have fallen to roughly 1.5 days this week, down from 2.8 days reported in late June, as the vessel bunching that strained berths earlier in the season begins to clear.

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What caused the earlier vessel bunching?

Port authority data combined with on-ground vessel-tracking telemetry indicated that three vessels on overlapping transpacific strings arrived within a 36-hour window in late June, creating a backlog that pushed berth wait times to 2.8 days at the peak. Terminal operators attributed the clustering to upstream schedule recovery following earlier delays at origin ports.

How quickly is the situation normalizing?

On-ground vessel-tracking telemetry shows berth wait times declining steadily over the past 10 days, from 2.8 days to roughly 1.5 days. Industry trade reporting suggests this is consistent with the backlog working through rather than a structural improvement, meaning a similar bunching event could recur if upcoming vessel arrivals cluster again.

Berth Wait Status Drayage Scheduling Note
Under 1 day Normal Standard scheduling
1-2 days Recovering Minor buffer recommended
2.5+ days Bunched 1+ day buffer, expect rolled appointments

Is further improvement expected in the coming weeks?

Port authority data on scheduled arrivals through the next 10 days does not show a repeat of the late-June clustering pattern, which supports continued improvement if vessels arrive on their currently published schedules. However, industry trade reporting notes that schedule reliability on these strings has been inconsistent, so the current pace of improvement is not guaranteed to hold.

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