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CONKLING KOPCIKECONOMICS

CK Data & Intelligence

Data by port

Each port’s traffic in one place: daily ship calls and cargo at major world ports, and for the U.S. West Coast, monthly container volumes, the loaded import and export split, and the San Pedro Bay series that Los Angeles and Long Beach share.

Every dataset cites its original source and can be downloaded as CSV or JSON, with key figures, a full data table and a ready-made citation on its page.

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U.S. West Coast port volatility

How much each U.S. West Coast port’s monthly container count has swung over the latest 12 months, against its own record.

Latest 12-month volatility of monthly TEUs by port, with each port’s median and the share of its past 12-month windows that were calmer
PortLatest (pts)Median (pts)Latest against the port’s own range: Calmer before
Los Angelesto Sep ’269.410.3since 199642% of windows
Long Beachto Aug ’268.110.1since 200527% of windows
San Pedro Bay (both)to Aug ’265.89.0since 200510% of windows
Oaklandto Sep ’269.78.0since 199973% of windows
Seattle–Tacoma (NWSA)to Sep ’2615.511.9since 201691% of windows

Volatility is the sample standard deviation of the latest 12 month-on-month percent changes in TEUs, in percentage points, not annualized; months without 12 consecutive changes behind them are skipped. The counts aren’t seasonally adjusted, so every window holds the same seasonal swing: compare a port with its own record more than with other ports. “Calmer before” is the share of the port’s earlier 12-month windows with lower volatility than the latest; the bar runs from its calmest window to its most volatile, with the median as a tick and the latest as a dot. Ports report on different schedules, so their latest months can differ.

CK estimate4 sources · as of October 9, 2026 – October 19, 2026 (varies by source); not recorded for 1 inputSources & methods
Period covered
Jan 1995 – Sep 2026
Source figures as of
October 9, 2026 – October 19, 2026 (varies by source); not recorded for 1 input
Geography
Port of Los Angeles, CA; Port of Long Beach, CA; Ports of Los Angeles and Long Beach (San Pedro Bay); Port of Oakland, CA; Ports of Seattle and Tacoma, WA
Sector
Transportation, Maritime Trade & Logistics · Maritime shipping
Seasonal adjustment
Not seasonally adjusted
Transformations
Rolling 12-month volatility of month-on-month changes, calculated by CK Economics. Los Angeles plus Long Beach, summed by CK Economics
Revisions
Recalculated on each input’s latest figures.
Data status
Current

Research standards

130 datasets

Major world ports

24 datasets

Ships calling each day and the cargo they load and unload at twelve major world ports, from IMF PortWatch’s ship tracking: Asia’s largest first, then Europe and the Americas.

Shanghai

Singapore

Ningbo

Busan

Hong Kong

Jebel Ali

Port Klang

Rotterdam

Antwerp

Hamburg

New York and New Jersey

Santos

Port of Los Angeles

8 datasets

The busiest container port in the US: its volumes, the loaded import and export split, and the San Pedro Bay series it shares with Long Beach.

Census trade by partner and product: Los Angeles, CA

Loaded imports and exports

San Pedro Bay, shared with Long Beach

Port of Long Beach

4 datasets

The second-busiest US container port, next door to Los Angeles, and the San Pedro Bay series the two share.

Census trade by partner and product: Long Beach, CA

San Pedro Bay, shared with Los Angeles

Other U.S. West Coast ports

6 datasets

Container volumes at the other major West Coast gateways, for comparison with San Pedro Bay.

Census trade by partner and product: Oakland, CA, Seattle, WA, Tacoma, WA

Container volume

Oakland’s loaded imports and exports

Wider context

91 datasets

Series that bear on every port: shipping costs, diesel and supply-chain pressure.