These are results for what is causing the warming of the pacific ocean near SAn Francisco?

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The Pacific Ocean near San Francisco is experiencing record-breaking warming (a severe marine heatwave,

NEP25A

) in early 2026, driven by a combination of weak coastal winds that reduce cooling upwelling, a persistent high-pressure system, and long-term ocean warming from climate change. These factors are expected to be further amplified by the development of a potential "Super"

El Niño

. 

Key Causes of Current Warming (May 2026):

• Weakened Upwelling: Normally, strong coastal winds force cold, nutrient-rich deep water to the surface (upwelling). Weakened winds have reduced this natural cooling mechanism, allowing the top layer of the ocean to heat up.
• Persistent High Pressure: A "ridging" pattern of high pressure has remained over the West Coast, reducing storm activity, decreasing cloud cover, and allowing the sun to heat the ocean surface more efficiently.
• Long-Term Climate Change: Human-caused climate change is raising the baseline temperature of the ocean, which has absorbed the vast majority of excess heat from greenhouse gas emissions.
• Impending El Niño: The impending
  El Niño
  conditions in 2026 are linked to warmer waters in the Pacific, which can intensify warm conditions along the California coast.
• Marine Heatwave
  NEP25A
  : A significant, long-lasting marine heatwave has been tracked since May 2025, setting records for the size of such events in the Northeast Pacific. 

These conditions are creating ecological impacts, similar to the "blob" of 2014-2015, including potential impacts on marine life and seabird mortality. 

• The California Current Marine Heatwave Tracker - Blobtracker

  Apr 14, 2026 — Large portions of the coastal region along the US west coast, particularly off central and southern California, continue to be imp...

  

  

  National Oceanic and Atmospheric Administration (.gov)
• The ocean off California keeps breaking heat records

  Apr 16, 2026 — There are several factors driving the staggering heat, including a unyielding ridge of high pressure straddling Southern Californi...

  

  

  Los Angeles Times
• A Super El Niño is coming. Here's how a hotter ocean could ...

  Apr 7, 2026 — When it comes to the climate, El Niño tends to release enormous amounts of heat stored in the oceans back into the atmosphere, boo...

  

  

  CNN

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