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Spain sea temperatures hit record highs in summer of 2026, port authority says

By Thomson Reuters Sep 11, 2026 | 7:11 AM

MADRID, Sept 11 (Reuters) – Sea temperatures around Spain reached record highs this summer, with multiple monitoring stations in the Mediterranean and off ​Spain’s Atlantic coast registering their highest readings, ‌the state port authority Puertos del Estado said on Friday.

Last month, scientists said that human-caused climate change was the main driver of recent record-breaking sea temperatures around Europe, warning ‌of ​severe consequences for marine ecosystems ⁠and coastal communities.

• The ⁠Dragonera buoy in the Balearic Islands recorded a water temperature of 33.02 degrees Celsius (91.44 degrees Fahrenheit) on August 5, the highest value ever ​registered in the port authority’s buoy network.

• Almost all buoys in the Levante-Balear basin of ⁠the Mediterranean set local temperature ⁠records during the summer, the authority ​said.

• Coastal buoys off Tarragona and Barcelona in northeastern Spain ​registered 30.7 C and 30.5 C, respectively, on ‌August 9.

• Record temperatures were also registered at several Bay of Biscay buoys in Spain’s northern regions. On June 23, the buoy near the ⁠northern town of Pasaia recorded 28.4 C. Another buoy, equipped with a temperature sensor since 2006, registered a ⁠record 25.27 C on ‌August 12.

• Spain has also experienced ⁠extreme heat on land this year, ​recording ‌61 days under heatwave conditions across ​the mainland ⁠and Balearic Islands in 2026, the highest number on record and above the previous peak of 41 days in 2022, according to the weather service AEMET.

(Reporting by Emma Pinedo; Editing by Andrei Khalip and ​Alison Williams)