04/22/2026
As Cetacean Station, we like to share whale-related updates from time to time. Sadly, there have been an unusually high number of whale deaths along the PNW coast this year—this article shares more about what’s been happening.
The surge in whale strandings along the West Coast in 2026 is not occurring in isolation. A growing body of research tied to El Niño events helps explain why years with unusual ocean warming often coincide with elevated whale mortality and shifting migration patterns.
Scientists have documented this connection for decades. During the strong El Niño, researchers observed widespread disruption in marine food webs across the Pacific. Warmer surface waters reduced nutrient upwelling, which led to declines in plankton populations. Because plankton forms the base of the food chain, species that depend on dense feeding grounds such as gray whales were forced to travel farther and expend more energy to find food. Studies published through organizations like NOAA showed that whales arriving at breeding lagoons during and after that event were often in poorer body condition, with lower reproductive success.
Similar patterns were recorded during the 2014 to 2016 marine heatwave known as “The Blob,” which overlapped with a moderate El Niño. Research highlighted by NOAA Fisheries and outlets like Mongabay found that gray whale strandings increased significantly in the years that followed. This period was formally classified as an Unusual Mortality Event, with hundreds of whales dying along the Pacific coast. Necropsies frequently pointed to malnutrition as a primary cause, reinforcing the link between ocean warming and food scarcity.
Migration behavior also changes during these events. Warmer waters can shift prey distribution northward or into deeper offshore zones. As a result, whales alter traditional routes, sometimes entering bays, rivers, or inland waterways where they are not typically seen. These unusual movements increase risks such as vessel strikes, entanglement, and stranding. Observations from The Marine Mammal Center and other research groups have consistently shown that disoriented or weakened whales are more likely to end up in hazardous environments.
The early data from 2026 aligns closely with these historical trends. Reports of gray whales in poor nutritional condition, combined with strandings across Puget Sound and the broader West Coast, suggest that environmental stress is already affecting the population. With forecasts indicating the possible development of a strong El Niño later in the year, scientists are watching closely.
If ocean temperatures continue to rise, the impacts seen in past events may intensify. Reduced food availability, disrupted migration timing, and increased physiological stress could contribute to another year of elevated mortality. While research continues to evolve, the connection between warming oceans and whale survival is well established, making 2026 a critical year for monitoring both climate conditions and marine ecosystem health.
