The NOAA Climate Prediction Center has issued a new El Niño Watch, drawing attention back to the Panama Canal. Early indicators suggest that conditions may again threaten this vital shipping route.

El Niño events usually lead to less rainfall in Central America, which directly affects the water levels of Gatun Lake. This lake serves as the freshwater reservoir for the canal's lock system.

In response to severe drought caused by El Niño during 2023-2024, the canal had to reduce its daily vessel transits to as low as 24 ships and impose draft restrictions under 44 feet. This situation created significant challenges for maritime shipping, as global supply chains were disrupted, resulting in congestion, increased transit costs, and extensive rerouting.

However, the situation has improved since then. A transition to La Niña and consistent rainfall restored water levels through 2025, enabling the canal to operate close to normal again with about 36 daily transits and a full 50-foot draft for Neopanamax vessels. By early 2026, Gatun Lake reached nearly maximum capacity, prompting authorities to open spillways—a remarkable turnaround from the record lows just two years earlier.

Now, NOAA anticipates that El Niño will develop by mid-2026 and continue through the end of the year, increasing the risk of rainfall shortages during the canal's crucial wet season.

Even a moderate El Niño could impact water availability, leading to fewer daily transit slots, lower draft limits that could restrict cargo loads, and increased prices for priority passage.

The key factor remains its intensity. NOAA estimates a 25% chance of a very strong El Niño, which would greatly raise the likelihood of further disruptions to the canal.

Currently, conditions are neutral, but for global shipping, the message is clear: all attention shifts back to the water levels in Gatun Lake.