Sea temperatures around Spain reach record levels in the summer of 2026

Record Sea temperatures rise around Spain Record levels during the summer of 2026, after several stations in the Mediterranean Sea and on the Atlantic coast monitored the highest water temperatures in the history of their measurements, according to the Spanish Ports Authority.

The new figures came as scientists warned that human-induced climate change has become the main driver of recent record rises in sea temperatures surrounding Europe, with potential impacts on marine ecosystems and coastal communities.

The marine warming coincided with an extremely hot summer on land, as Spain recorded a record number of days subject to heat waves.During the current year, this reflects the extension of high temperatures between the sea and the land.

Sea temperatures set records

Data from the Spanish Ports Authority showed that the highest water temperatures were recorded since the start of measurements by monitoring buoys in various locations around the country.

The record numbers included areas in the Mediterranean Sea, as well as parts of the Atlantic coast and the Bay of Biscay in northern Spain, indicating the expansion of the phenomenon of rising sea temperatures across a wide geographical range.

These measurements reinforce scientific warnings about continued marine warming around Europe, especially with the recurrence of heat waves and high temperatures during the summer months.

33 degrees near the Balearic Islands

The Dragonera buoy in the Balearic Islands recorded a temperature of 33.02 °C on August 5, the highest value ever recorded by the Spanish Ports Authority buoy network.

Most of the buoys in the Levante-Balearic Basin in the Mediterranean also recorded local record levels during the summer, while the water temperature near Tarragona reached 30.7 degrees Celsius, and Barcelona recorded 30.5 degrees on August 9.

These levels reveal the extent of the rise in sea temperatures in the western Mediterranean, which is one of the regions witnessing increasing effects of warming in recent years.

For a broader understanding of the trends in sea temperature rise and the impact of heat waves and drought on them, read also: Sea temperature records the highest level inJuly amidst heat waves and drought.

The numbers extend to northern Spain

The record levels extended to other regions far from the coast of the Mediterranean, as several buoys in the Bay of Biscay recorded unprecedented temperatures.

On June 23, a buoy near the northern city of Pasaya recorded 28.4 degrees Celsius, while another buoy equipped with a temperature sensor since 2006 recorded a record high of 25.27 degree on August 12.

The extension of the records from the Mediterranean to northern Spain indicates that the phenomenon is not concentrated in one region, which increases the importance of monitoring changes in water temperatures and their potential effects on different marine environments.

Climate change behind warming

Scientists indicated in August that human-induced climate change was the main factor behind recent record levels of sea temperatures around Europe.

Continued rising sea temperatures pose risks to marine ecosystems on which many organisms depend, and may also affect coastal communities economically linked to food, fishing, and marine activities.

This intersects with the fourteenth goal of the Sustainable Development Goals (SDGs), which concerns life under water, especially since changing sea temperatures can add new pressures to marine systems and their ability to maintain their balance.

Heat extends to land

was not limitedRecord sea temperatures in Spain, as the country recorded 61 days in 2026 under heat wave conditions on the mainland and the Balearic Islands, according to the Spanish Meteorological Authority AEMET.

This number represents the highest level on record, exceeding the previous number of 41 days in 2022, which reflects the intensity of the heat that the country witnessed during the year.

The coincidence of extreme heat on land with rising sea temperatures intersects with the thirteenth goal of the Sustainable Development Goals (SDGs) on climate action, in light of the increasing need to enhance the ability to adapt to heat waves and the changes witnessed by coastal and marine systems.

In light of these developments, The Earth Guards Foundation indicates that the record numbers recorded around Spain highlight the expanding influence ofWarming between the sea and land, and stresses the importance of monitoring sea temperature rise as an indicator linked to the health of marine systems and the ability of coastal communities to confront the effects of climate change.