Panama Canal to Tighten Draft Limits as El Niño Strengthens

The Panama Canal Authority (ACP) will introduce additional draft restrictions for vessels using its Neopanamax locks later this summer as forecasts indicate a strengthening El Niño could reduce rainfall across the canal’s watershed.

In a shipping advisory issued on July 1, the ACP announced that the maximum authorized draft will be reduced to 49.0 feet (14.94 meters) tropical fresh water (TFW) from July 24. A further reduction to 48.5 feet (14.78 meters) will take effect on August 15. These measures follow an earlier reduction to 49.5 feet that came into force on July 3.

According to the ACP, the revised limits form part of its water management strategy to maintain the “safe, reliable and sustainable” operation of the canal while responding to current hydrological conditions and preparing for the expected effects of El Niño.

The ACP will continue to closely monitor lake levels and hydrological projections and will announce any additional operational adjustments as deemed necessary,” the advisory said.

The latest announcement represents the second set of operational changes introduced this year and reflects increasing confidence that El Niño conditions are becoming established.

On Friday, the World Meteorological Organization confirmed that El Niño has developed in the tropical Pacific and is expected to intensify rapidly during the Northern Hemisphere autumn. Forecast models indicate a high probability that the event will become a strong El Niño, raising the risk of drought, heatwaves, and other extreme weather in many regions, including parts of Central America.

Lower rainfall presents a significant challenge for the Panama Canal because every vessel transit through its lock system relies on freshwater stored in Gatun Lake. Conserving water therefore becomes increasingly important during dry periods.

Although the new draft restrictions are tighter, they remain less severe than those imposed during the historic 2023-24 drought, when critically low lake levels forced major draft limitations and transit reductions, disrupting global shipping and creating lengthy queues of waiting vessels.

Over the past year, canal authorities have introduced several measures to reduce water consumption and help prevent a repeat of that situation. These include increased use of the Neopanamax locks’ water-saving basins, simultaneous lockages for smaller ships, the use of interior lock gates to minimize water loss, and the suspension of hydroelectric generation at Gatun to preserve water supplies.

Despite the new restrictions, the canal continues to accommodate heavy traffic. The ACP has maintained approximately 38 vessel transits per day, close to its maximum operating capacity, as shipping volumes have recovered following the previous drought and ongoing disruptions on other major trade routes continue to support demand.

The Panama Canal, which handles around 5% of global maritime trade, said it will continue monitoring Gatun Lake water levels and weather forecasts before deciding whether any further operational adjustments are required.