“The Gulf is now the hottest it’s been in the modern record, according to Brian McNoldy, a climatologist at the University of Miami, who produced the chart. Taking a dip would feel like a bath: The average temperature of the surface is close to 90 degrees, according to recent measures of sea surface temperature.
“This is out of bounds from the kinds of variability that we’ve seen in [at least] the last 75 years or so,” Ben Kirtman, director of the Cooperative Institute for Marine and Atmospheric Studies, a joint initiative of the University of Miami and the National Oceanic and Atmospheric Administration (NOAA), told Vox. “That can be scary stuff.”
These record temperatures are just one signal of a more widespread bout of warming across the North Atlantic that ramped up last year. It’s still not entirely clear what’s causing it, though scientists suspect a combination of factors including climate change — which raises the baseline ocean temperature — as well as lingering effects of El Niño, natural climate variability, and perhaps even a volcanic eruption.”
https://www.vox.com/climate/368324/hurricane-season-2024-gulf-mexico-ocean-warming