Above average temperatures continued across the entire northern half of the Atlantic Ocean during September 2023. Temperatures were also anomalously warm over much of North and South America. The El Niño is of course striking too.

Data from ERA5 reanalysis at https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview.

https://fediscience.org/system/media_attachments/files/111/187/813/258/487/762/original/f0b488abcffd24d7.png