Top 10 Most Congested Ports Right Now (Based on AIS Data)

Port congestion data reveals how global supply chains are performing in real time, highlighting delays that continue to disrupt shipping worldwide. By analyzing AIS port congestion data, we can identify where vessels are queuing, how long they wait, and which regions are currently experiencing the most pressure.

In this report, we break down the top 10 most congested ports right now, using real-time AIS-derived insights such as vessel density, anchorage queues, and average waiting times.

What Is AIS Port Congestion Data and How Is It Measured?

AIS port congestion data is derived from Automatic Identification System (AIS) signals transmitted by vessels. These signals provide real-time information about ship position, speed, and status.

Congestion is typically measured using:

• Number of vessels at anchor (waiting outside port)

• Average waiting time before berthing

• Traffic density within port boundaries

• Arrival vs departure imbalance

By aggregating the port congestion data, it becomes possible to build an accurate picture of port performance and identify bottlenecks as they develop.

How We Analyze AIS Port Congestion Data?

To determine the most congested ports, we analyze:

• Live AIS vessel positions within defined port areas

• Vessel movement patterns (idle vs active)

• Historical comparison of traffic levels

Ports with high vessel accumulation + long waiting times rank highest in congestion.

Top 10 Most Congested Ports Right Now:

Below is a snapshot of the most congested ports based on recent AIS observations.

1. Shanghai Port:

Shanghai continues to experience heavy congestion due to its massive container throughput. AIS data shows persistent anchorage queues and high vessel density.

2. Singapore Port:

As a global transshipment hub, Singapore regularly sees congestion spikes, especially during peak trade cycles.

3. Los Angeles Port:

Port congestion remains sensitive to import surges and inland logistics constraints, reflected in vessel queues offshore.

4. Rotterdam Port:

Europe’s largest port shows moderate congestion, with periodic spikes tied to inland transport delays.

5. Antwerp Port:

Closely linked to Rotterdam, Antwerp experiences similar congestion patterns, particularly for container vessels.

How Port Congestion Affects Shipping in Practice?

Port congestion has a direct impact on:

• Shipping costs (fuel, delays, demurrage)

• Supply chain reliability

• Inventory planning

• Commodity trading decisions

For companies relying on maritime logistics, understanding congestion is no longer optional, it’s critical.

Access Real-Time AIS Port Congestion Data via API:

For companies that need continuous monitoring, accessing real-time AIS port congestion data is essential.

The Datalastic API provides a powerful location traffic tracking endpoint that enables users to:

• Monitor vessel density within port areas

• Track anchorage queues in real time

• Analyze congestion trends globally

• Build automated alerts for delays and bottlenecks

This allows developers, logistics teams, and analysts to integrate congestion intelligence directly into their systems and make faster, data-driven decisions.

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