Navigating US Port Congestion: A Data-Driven Map for 2026

US port congestion in 2026 looks nothing like the 2021–2023 pattern. In March 2026, East and Gulf Coast ports overtook West Coast ports in US containerized import share by 6.0 percentage points, with the East and Gulf Coasts commanding 44.3% compared to the West Coast's 38.3%. This shift, documented in the Descartes April 2026 Global Shipping Report, effectively upends long-standing coastal dominance across major trade lanes.

Currently, Savannah is operating under sustained cargo pressure, while Los Angeles and Long Beach have significantly eased after clearing out their post-holiday peaks. This structural inversion is driven by two primary macroeconomic forces: approximately 100 trade-policy actions affecting import duties tracked between early 2025 and early 2026, and the steady migration of transit flows through the expanded Panama Canal. The canal now handles more than 40% of all US container traffic, an annual volume valued at roughly $270 billion.

Because of these shifting dynamics, container port congestion has stopped being a localized operational risk; it now sits directly inside the routing decision at the shipper level. Shippers must adapt, recognizing that rerouting has to happen before a container ships, long before demurrage starts accumulating.

To address this, the AiDeliv reverse auction freight exchange surfaces active carrier bids on alternative US ports side-by-side with live port congestion data, allowing shippers to compare actual costs before making a commitment. On this platform, multiple carriers compete dynamically on the lane, the winning bidder ships the cargo, and AiDeliv aggregates the regional data signals into a unified interface.

Current State of West Coast vs. East Coast Ports

The volume and efficiency profiles of US marine terminals have re-aligned, split by conflicting recording methodologies. Shippers relying on a single data point without validating the underlying reporting mechanism risk landing in hidden bottlenecks. Different methodologies answer fundamentally different operational questions; a defensible logistics decision requires evaluating multiple data reads.

Q1–Q2 2026 Port Capacity & Performance Reference

While Portcast P50 medians (measuring fleet-wide 50th-percentile anchorage wait times via AIS data) show minimal vessel queues, carrier rolling averages reflect higher shipment-level delay outcomes because they isolate practical transit constraints.

This divergence is clear when looking closer at terminal performance. For instance, during the peak cargo briefing on November 18, 2025, Gene Seroka, executive director of POLA, noted that October volume came in at 848,431 TEU. He characterized it as "a steady month, about 6% below last October, yet 1% above our 5-year running average," correctly predicting the port would surpass 10 million TEU for the year.

Concurrently, Long Beach processed 839,671 TEU in October 2025, marking a 14.9% decline year over year, though this contraction was measured against an all-time record October 2024 base. Despite this dip, Long Beach finished 2025 with an all-time annual record of 9,881,595 TEU, while Los Angeles cleared 10,239,318 TEU.

2025 Gateway Volume Totals:

Ultimately, Q1 2026 re-ordered national priorities. Total containerized imports across all US ports hit 2,353,611 TEU in March, making it the fourth-highest March on record. This volume was capably absorbed via multiple gateways, such as the expanded Panama Canal. The canal comfortably accommodates Neopanamax vessels of more than 14,000 TEU, subject to dimensional and draft limits.

According to ACP CFO Víctor Vial, the Panama Canal posted revenue growth of 8–10% year over year during the first five months of its fiscal year 2026 (October 2025 through February 2026), proving that the diversion of cargo away from historical intermodal rail paths remains a permanent, long-horizon shift.

Sellers should also account for the emerging "fourth dimension" of the container map: Houston and Mobile. The Gulf Coast absorbed a notable portion of the import flow in March 2026 that previously routed exclusively through southern California terminals. Sourcing migrations toward Vietnam, India, and Mexico naturally align with the Panama Canal and Gulf routes. This evolution has shifted the Gulf Coast profile from a niche energy hub into a highly diversified mixed lane moving consumer goods, automotive parts, and chemicals. Shippers are no longer limited to a binary choice between the East or West Coast; they must balance four active gateways: West, East, Gulf, and Mexico cross-border intermodal entry.

Why Traditional Tracking Fails During Peak Congestion

Standard GPS tracking and reactive carrier ETAs frequently fail to capture terminal bottlenecks. While GPS accurately flags raw vessel coordinates, it remains blind to land-side constraints like berth capacity, terminal yard saturation, chassis deficits, or intermodal rail backlogs.

Modern visibility technology requires segmenting tracking data into three operational layers:

1. Ocean-side: Tracking anchorage dwell time and vessel approach to berth. Standard GPS tracking typically only monitors this single layer.

2. Terminal-side: Monitoring active vessel discharge times and physical container yard dwell.

3. Inland-side: Reconciling container chassis availability, local drayage dispatch, and intermodal rail load queues.

During severe, historical congestion waves — most notably in late 2024 — inland-side friction caused on-dock rail dwell at Los Angeles to stretch up to six additional days compared to local truck drayage. While the San Pedro Bay rail-to-truck dwell differential narrowed to roughly 1.8 days in March 2026 (averaging 4.41 days for rail versus 2.61 days for truck), these intermodal backlogs re-open rapidly during unannounced import surges.

Relying on generalized averages also introduces significant blind spots. For example, in April 2026, the Portcast live-tracker median vessel wait time at NY/NJ stood at a nominal 0.08 days. However, addressing a critical operational imbalance, Bethann Rooney, Port Director at PANYNJ, issued a written tariff-revision statement in April targeting the port's container imbalance fee. The fee was revised specifically to penalize an accumulating backlog of empty containers, which forced depots to redirect empty equipment to off-dock facilities to clear terminal space.

Median figures naturally mask these outliers. Long-tail terminal congestion is defined by the 90th percentile (P90) of wait time, capturing the specific vessels and containers sidelined far past the median baseline. Shippers relying solely on standardized carrier schedule feeds frequently find out they have landed in this P90 tail after demurrage has already begun.

The Hidden Financial Cost of Terminal Congestion

The true financial penalty of port friction is rarely highlighted on initial carrier ocean invoices, as carriers do not absorb terminal dwell costs ; instead, the under-modeled expense surfaces at invoice time as a direct hit to product margin.

In 2026, demurrage exposure must be modeled as a multi-layered financial stack:

• Ocean-Carrier Demurrage: Tariffs for standard dry 40-foot import containers commonly range from $255 to $575 per day, rapidly escalating above $500 per day on extended holds.

• Terminal/MTO Storage: Assessed in progressive tiers on top of carrier fees. For example, the YTI terminal tariff at the Port of Los Angeles bills $52.77, $105.47, and $210.93 per day for 40-foot containers across successive tier levels.

• Chassis Daily Fees: Add an extra $22 to $55 per day depending on the equipment provider and regional pool. DCLI, for instance, publishes 2026 rates of $28.55 for the Savannah/Southeast region, $45 for NY/NJ, and $47.50 for LA/LB. FlexiVan daily rates track at $22 for Savannah, $37.75 for NY, and $40.75 for LA.

Under these integrated rate structures, a single container delayed in Savannah for eight days past its standard Garden City terminal free time faces a combined carrier-plus-terminal exposure approaching $3,500 to $3,800. This includes a $3,265 bill from Hapag-Lloyd's 2026 Savannah carrier tariff alongside roughly $493 in GPA terminal storage surcharges. In this environment, historical marketing benchmarks of "over $2,000" represent a conservative floor rather than a maximum financial ceiling.

These penalties hit harder as the international maritime sector navigates an extended shipping downcycle. The container freight industry has endured a prolonged bottoming phase that began around March–April 2022, stretching into a near four-year trough by early 2026.

According to Drewry World Container Index data, Q1 2026 macro spot rates sat materially below the elevated, disruption-heavy baselines of Q1 2025, which had been artificially inflated by the onset of Red Sea lane diversions. Contract rates have largely trended below spot averages across major corridors. Xeneta data highlights that fixed-to-spot market spreads reached 10–20% on transpacific routing and widened to 28–30% on Asia-Europe lanes during disruption-driven spot spikes.

Predictive Analytics: Spotting Bottlenecks Before Arrival

Predictive port analytics closes the visibility gap by blending real-time AIS feeds, carrier port call schedules, terminal gate performance, weather patterns, and historical traffic flows to forecast cargo bottlenecks up to 72 hours before physical impact.

Independent visibility platforms bridge this data divide by integrating directly with port community systems and terminal APIs. For example, Portcast monitors more than 600 global ports, structuring its predictive analytics around P50 (median baseline), P75 (building pressure), and P90 (extreme long-tail outliers) wait times. The platform pairs these percentiles with active Vessels Waiting counts at anchorage and a Long Tail Congestion warning flag to help logistics teams assess immediate operational risk. Shippers can actively observe this when ports present low median delays but carry active long-tail outlier warning flags.

"Companies are leveraging data and technology to make faster, more informed decisions in a complex trade environment," noted Jackson Wood, Director of Industry Strategy, Global Trade Intelligence at Descartes, within the company's April 2026 Global Shipping Report.

Advanced maritime AI networks build on this by applying multi-source data fusion. Platforms like Windward fuse AIS data with satellite imagery, regulatory feeds, and defense tracking to apply behavioral analytics to vessel performance. Similarly, SeaVantage focuses on ocean-freight visibility and predictive ETA tracking by evaluating historical port call behaviors.

These models are trained to differentiate whether a vessel is sitting at anchorage due to passing weather or systemic berth scarcity. This nuance is vital: a weather delay is typically short-lived, whereas berth scarcity can stall a container for multiple days, necessitating an immediate rerouting maneuver.

According to official service guidance from C.H. Robinson, managing tariff and congestion volatility requires running comprehensive risk scenarios and building dynamic contingency plans. Michael Castagnetto, President of North American Surface Transportation at C.H. Robinson, frames this strategy around supporting shippers through structural market uncertainty. Shippers use these predictive frameworks to model three distinct routing choices: a primary base port, an alternative coast, or an alternative transit through the Panama Canal.

By integrating active container rates with live terminal categories, the system automatically recalculates expected landed costs with demurrage probability fully baked into the model.

AiDeliv's Port Congestion Tracker vs. Standard GPS

AiDeliv prioritizes the executable routing decision rather than passive vessel coordinates. The platform's integrated port delays tracker maps live terminal congestion metrics directly to active reverse auction lots. Shippers view competitive carrier bids side-by-side with the real-time congestion category of each destination port. Standard tracking only indicates where a container is positioned mid-transit; AiDeliv provides a comparative, multi-routing dashboard before the cargo ever departs the origin port.

The platform's integrated routing assistant operates directly on top of this data layer. When an import gateway's congestion index transitions into a Medium or High category, the routing assistant automatically surfaces alternative US entry ports, detailing active carrier DDP rates, expected duties, calculated demurrage probabilities, and current terminal yard dwells.

Integrating a live reverse auction marketplace significantly accelerates a shipper's response to terminal disruptions. While traditional procurement exercises via manual RFQ or RFP processes take weeks to gather and compare forwarder rates, the freight exchange interface compresses this workflow into hours. Carriers place active bids on specific shipment parameters, allowing the shipper to see live, market-driven pricing on a single, centralized screen.

Furthermore, demand aggregation features allow cross-border shippers to pool grouped shipments, distribute volume strategically across multiple ports, and directly compare all-in DDP rates route by route.

This setup allows logistics managers to compare bids from carriers with distinct terminal ownership stakes and hub allocations simultaneously:

• Gemini Cooperation (Maersk, Hapag-Lloyd): Operates via Maersk-owned APM Terminals across multiple US ports, leveraging explicitly documented "preferred berthing" networks and terminal efficiencies within their controlled hubs.

• Ocean Alliance (CMA CGM, COSCO, Evergreen, OOCL): Secures expedited transit and prioritized container yard access through dedicated footprints like the CMA CGM-owned Fenix Marine Services terminal at the Port of Los Angeles.

• Premier Alliance (ONE, HMM, Yang Ming): Replaced THE Alliance in 2025 under formal FMC agreements. ONE maintains majority ownership stakes in Yusen Terminals (Long Beach) and TraPac (Los Angeles, Oakland), while Yang Ming operates affiliated service networks out of the West Basin terminal.

AiDeliv Platform Data Proof Block (Q1 2026 US-Bound Shipments)

• Number of auctions with at least one port-reroute request: 314 (Representing 14.2% of total US-bound RFQs)

• Top 3 origin ports by reroute volume: Shanghai, Ningbo, Shenzhen

• Top 3 destination ports by reroute volume: Savannah, New York / New Jersey, Houston

• Median savings on auction lanes rerouted away from a High-congestion port: 16.8% vs. original contract quote

• Median time from RFQ post to first qualifying bid on rerouted lanes: 22 minutes

The 2026 regulatory environment forces routing decisions much earlier in the shipment timeline — before the container ships, not after demurrage starts accumulating. With import fee structures tightly penalized and contract-spot dynamics shifting each quarter, static tracking is no longer sufficient.

The AiDeliv freight auction marketplace surfaces active carrier bids on alternative ports side-by-side with live congestion data, ensuring you see the true financial impact of your routing before committing. Post your next lane through the auction, let carriers compete on a transparent DDP rate, and secure your margins against terminal disruption.

Start an RFQ →

Sources & Regulatory References: Descartes Global Shipping Reports (April & May 2026 Coastal Share Analyses); Port of Los Angeles (POLA) & Port of Long Beach (POLB) Official Monthly Performance Statistics; Georgia Ports Authority (GPA) Operational Metrics; Pacific Maritime Shipping Association (PMSA San Pedro Bay Dwell Datasets); Portcast Congestion Tracking Methodologies; Federal Maritime Commission (FMC Senate Testimony via Chairman Louis Sola); Panama Canal Authority (ACP Fiscal Year 2026 Financial Bulletins); Cass Freight Index & FreightWaves Market Overviews; Drewry World Container Index (WCI Corridor Snapshots); Xeneta Freight Data Network; Yusen Terminals Inc. (YTI Terminal Storage Tariffs); Hapag-Lloyd 2026 US Demurrage Schedules; DCLI & FlexiVan Published 2026 Equipment Leasing Rates; C.H. Robinson Freight Insights; Windward & SeaVantage Corporate Positioning Materials.