The current highs for the time of year have been surpassed by over 50 days, the biggest margin in the satellite era.
The primary culprits are gases that warm the planet, but El Niño, a type of natural meteorological occurrence, has also contributed to sea level rise.
The extreme heat of the waters has severely impacted marine life and sparked a fresh round of coral bleaching.
Data from the EU’s Copernicus Climate Service served as the basis for the analysis.
Copernicus went on to affirm that the previous month had been the highest April ever recorded in terms of air temperature, bringing the run of consecutive month-specific records to 11.
In the High Court, the government’s climate plans were defeated.