Marine Heatwave Bulletin Forecasts for September 26, 2026 – Reposted from Mercator Ocean International

Marine heatwave categories North Atlantic The marine heatwave extending from the English Channel to the Bay of Biscay is intensifying and is now mostly in the “strong” category, with “severe” and “extreme” conditions in some areas. The marine heatwave off the coasts of Portugal and Morocco is intensifying, with “strong” conditions covering a larger area…. Read More Map of marine heatwave categories for the 26 September 2026 forecast across the global ocean. GLO12 forecast. Source: Mercator Ocean International

Outlook of Sargassum Blooms – August 31, 2026

A perspective for the Caribbean Sea and Gulf of America by University of South Florida Optical Oceanography Lab (bbarnes4@usf.edu, yuyuan@usf.edu, huc@usf.edu) The map above shows the average Sargassum abundance for the month of August 2026, with warm colors representing higher abundance. The top color (red) indicates that 0.4% of the ocean surface is covered by… Read More Sargassum Outlook Aug 31 2026

Marine Heatwave Bulletin Forecasts for August 29, 2026 – Reposted from Mercator Ocean International

Global Ocean North Atlantic The marine heatwave in the Gulf of Mexico is increasing in intensity as the area covered by strong categories expands. The marine heatwave off the coast of Guinea is shrinking in area but remains generally stable in intensity, with conditions still ranging from moderate to strong.  South Atlantic The marine heatwave… Read More Marine heatwave category forecasts for 29 August, 2026 for the Global Ocean. Data: GLO12 forecast. Source: Copernicus Marine Service/Mercator Ocean International.

Marine Heatwave Bulletin Forecasts for August 22, 2026 – Reposted from Mercator Ocean International

Global Ocean North Atlantic The marine heatwave in the North Atlantic is shrinking in area but, more importantly, in intensity. Only a few areas remain in the “strong” category—north of Spain, around the Canary Islands, and in the central part of the basin around 30°N—while the rest have been downgraded to “moderate”. Mediterranean Sea The… Read More Marine heatwave category forecasts for 22 August, 2026 for the Global Ocean. Data: GLO12 forecast. Source: Copernicus Marine Service/Mercator Ocean International.