The 2025 Pacific hurricane season was the most active in seven years
In short: With twenty named storms, the 2025 Pacific hurricane season broke a long-standing lull in activity. Driven by unusually warm waters off the Mexican coast, the season produced eleven hurricanes and four major ones. It was a year of records, including the earliest major hurricane landfall in Mexican history.
The 2025 Pacific hurricane season was defined by its intensity and early start, marking the first time since 2018 that twenty named storms developed. While the Eastern Pacific basin saw eighteen of these storms, the Central Pacific contributed two. Collectively, the season generated an accumulated cyclone energy (ACE) of approximately 127.3 units, surpassing the typical range of 80 to 115 units observed between 1991 and 2020. Despite this heightened activity, the season was notable for being the first since 2022 to avoid producing a Category 5 storm.
A primary driver of this activity was the persistence of warmer-than-average sea surface temperatures off Mexico's western coast, a trend linked to a negative Pacific decadal oscillation phase that began in 2021. This environment allowed for rapid intensification in several systems. Hurricane Erick, which struck Oaxaca in June, became the earliest major hurricane to hit either the Pacific or Atlantic coast of Mexico, shattering a record previously held by Hurricane Kiko since 1989. The season also saw a rare occurrence in late July, when Hurricane Iona and Tropical Storm Keli formed concurrently in the Central Pacific, a phenomenon not seen in that basin for a decade.
The human and economic toll was significant, particularly in Mexico. Hurricane Erick alone caused at least 24 fatalities and over US$350 million in damages. Other systems, such as Tropical Storm Dalila and Hurricane Flossie, brought severe flooding, landslides, and infrastructure damage across multiple Mexican states. By October, the season's final storm, Tropical Storm Sonia, dissipated, ending a period that had tested regional resilience through heavy rainfall and storm surges. While forecasts from NOAA and Mexico's SMN had anticipated an active season, the actual development of storms like Erick and Iona highlighted the volatility of the Pacific basin when atmospheric conditions align with elevated water temperatures.
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- Summary by Intellect · source: 2025 Pacific hurricane season
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