Panama Canal Delays Draft Cut Again Amid El Niño Drought

Second Delay in Weeks for Neopanamax Draft Restriction

The Panama Canal Authority (ACP) has, for the second time in recent weeks, postponed a scheduled reduction to the maximum permitted draft for vessels transiting the newer Neopanamax Locks. According to a report by The Maritime Executive, the decision reflects the authority’s latest assessment of water levels in Gatun Lake alongside updated weather forecasts.

The Neopanamax Locks had been due to cut maximum draft to 14.48 meters (47.5 feet) from the start of September, a reduction of half a foot from the current 14.63-meter (48-foot) limit. That change was first pushed back to October 1, and has now been shelved again, with the ACP confirming the current 48-foot limit will remain in place.

A Looming Super El Niño

The backdrop to the canal’s caution is a developing Super El Niño event in the Pacific. The World Meteorological Organization said on September 3 that the phenomenon is “firmly established” and expected to intensify further, with an almost certain chance of persisting through February 2027. UN Secretary-General António Guterres described the pattern as being “supersized before our eyes,” warning that rising sea temperatures are pushing the world into a “danger zone” for extreme weather.

Despite that grim long-range outlook, the ACP’s own data shows Gatun Lake levels have held fairly steady around 84 feet after dipping slightly below that mark in late August, with a modest rise of up to 0.4 feet forecast into October before levels are expected to decline again — a seasonal pattern tied to Panama’s rainy season.

Managing Traffic Through Levers Other Than Draft

Rather than tightening draft immediately, the ACP is instead adjusting transit slots. Daily bookings through the older Panamax Locks were cut to nine as of September 3, and Panamax transits overall were reduced to 25 per day, with a further cut to 23 scheduled for September 15. This mirrors the approach the authority used during the 2023 drought, balancing draft limits against the number of daily transits to conserve water while keeping cargo moving.

There are early signs the strategy is easing congestion: average wait times for non-booked northbound vessels have fallen to 8.8 days, with only four unbooked vessels currently waiting (three of them Neopanamax-class) against 85 vessels holding reservations as of September 3.

Why Draft Stability Matters to Owners and Charterers

For large containerships and gas carriers, the difference between a 48-foot and 47.5-foot draft can determine how much cargo can be loaded before a Panama Canal transit becomes cargo-limiting. The source notes that gas carriers have already diverted around South America to avoid the uncertainty, and some have paid record auction premiums to secure faster passage. During the 2023-2024 drought, container operators resorted to transshipping boxes across the isthmus by rail to keep vessels within the reduced draft.

What This Means for Fleet and Voyage Planning

The repeated postponements underscore how unpredictable Gatun Lake’s water balance has become under El Niño-driven weather swings, even when long-range forecasts point toward drought. For ship managers and charterers routing tonnage through Panama, this volatility puts a premium on real-time monitoring rather than planning around a fixed draft figure months in advance. Vessels booked close to the current maximum draft face real exposure if the ACP reinstates the cut with short notice, potentially forcing last-minute discharge, cargo restowage, or rerouting decisions.

This is also a reminder of why accurate, independent draft and loading verification matters at ports feeding into transit-restricted routes. A survey confirming actual draft, trim, and cargo distribution before departure can prevent costly delays or penalties if a vessel arrives at the canal marginally over a newly imposed limit. As the ACP continues to “closely monitor” the situation and reserves the right to change draft rules again, owners with cargo scheduled through the canal in the coming months would do well to build contingency margin into their draft calculations rather than assume current limits will hold.

The ACP says it remains committed to providing advance notice of any future changes affecting vessel draft requirements, but as this second reversal shows, those commitments can shift quickly in response to weather data.

Reviewed by Ibrahim Halil Ceylan, Marine Surveyor at Apeks Marine.