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Maritime shipping

Bosporus Strait — Daily Cargo in Transit (Estimated)

An estimate of the cargo carried through the Bosporus Strait each day, in metric tons, from IMF PortWatch. The strait joins the Black Sea to the Sea of Marmara, the Black Sea's only sea route to the Mediterranean.

Data status: Current
Official statisticSource figures as of October 16, 2026Sources & methods
Sources
IMF PortWatch (International Monetary Fund and University of Oxford)
Period covered
Jan 1, 2019 – Oct 11, 2026
Source figures as of
October 16, 2026
Geography
Bosporus Strait, Türkiye
Sector
Transportation, Maritime Trade & Logistics · Maritime shipping
Seasonal adjustment
Not seasonally adjusted
Transformations
Views other than the level (changes, averages, volatility) are calculated by CK Economics from these figures
Revisions
Replaced with the source’s latest figures whenever it revises them.
Data status
Current
Limitations
Seasonal swings are left in: compare a period with the same period a year earlier.

Full method · Research standards

Key figures

CK estimateMetric tons · calculated by CK Economics from International Monetary Fund data

Latest · Oct 11, 2026
449,000
28-day average −637,387 metric tons vs a year earlier1
5-year change
−705,173 metric tons
28-day average, against the 28 days to Oct 11, 20212
Record high
2,540,000
Dec 16, 20213
Record low
0
May 17, 2020 (and 1 other period)3
Where the latest ranks
2nd pct.
Higher than 2% of the other 2,840 observations since Jan 1, 20194
  1. 1Average of the latest 28 days against the average of the same 28 days a year earlier; a single day swings too much to compare.
  2. 2Average of the latest 28 days against the same 28 days five and ten years earlier. No yearly growth rate is given for daily series.
  3. 3Highest and lowest published observations across the full history shown.
  4. 4Share of the other published observations that are lower than the latest one, rounded down.

Methodology

PortWatch's estimate of the cargo carried by the ships that transit the Bosporus Strait each day (container ships, dry bulk carriers, general cargo ships, roll-on/roll-off (ro-ro) ships and tankers). For each ship it estimates how full the ship is from its draft and dimensions, and multiplies that share by the ship's deadweight tonnage (the most it can carry). The day's value is the sum over every transiting ship, in metric tons. A transit is counted when a ship passes through the chokepoint's boundary. A passage that spans several days is counted once, and the same ship is not counted again within 48 hours. IMF PortWatch builds it from the Automatic Identification System (AIS) position signals that ships broadcast, as collected by the UN Global Platform, following Arslanalp, Koepke and Verschuur, "Tracking Trade from Space" (IMF Working Paper 2021/225). The series runs daily from 1 January 2019, with days in Coordinated Universal Time (UTC). PortWatch adds new days about once a week, a few days behind, and may revise recent days as late signals arrive. Single days swing with ship arrivals, so totals over a week or a month show the trend more clearly. These are estimates modelled from ship movements, not customs or canal records, and can differ from official tonnage statistics. Values are as published (the capacity field).

How we collect, check and project every dataset →

Source

International Monetary Fund, PortWatch, Daily Chokepoints Data (Bosporus Strait, chokepoint3), with the University of Oxford; AIS data from the UN Global Platform: https://portwatch.imf.org/datasets/3da2b9ca97684916b75c4013f95d18ab_0/about — figures as published on 16 October 2026.

All data

2,841 observations, newest first · Metric tons

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PeriodValueChange y/y
Oct 11, 2026449,285−523,097 metric tons
Oct 10, 2026499,198−543,438 metric tons
Oct 9, 2026609,242−818,651 metric tons
Oct 8, 2026321,418−1,156,564 metric tons
Oct 7, 2026586,044−618,419 metric tons
Oct 6, 2026623,794−923,126 metric tons
Oct 5, 2026790,909−474,165 metric tons
Oct 4, 2026528,076−313,816 metric tons
Oct 3, 2026215,118−437,031 metric tons
Oct 2, 2026603,216−1,253,825 metric tons
Oct 1, 2026646,038−1,193,102 metric tons
Sep 30, 2026824,043−809,784 metric tons
Sep 29, 2026683,208−382,334 metric tons
Sep 28, 20261,022,145+178,695 metric tons
Sep 27, 2026357,109−232,811 metric tons
Sep 26, 2026579,418−876,457 metric tons
Sep 25, 2026766,060−1,324,414 metric tons
Sep 24, 2026648,432−476,270 metric tons
Sep 23, 2026677,237−804,752 metric tons
Sep 22, 2026400,835−1,161,723 metric tons
Sep 21, 2026451,861−915,967 metric tons
Sep 20, 2026923,664+453,092 metric tons
Sep 19, 2026653,789+131,507 metric tons
Sep 18, 2026648,058−886,513 metric tons

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