The Mediterranean Sea, including waters around Malta, is currently experiencing a marine heatwave, with sea surface temperatures rising well above seasonal averages. The data, released by CopernicusEU – the Earth Observation component of the EU Space Programme – paints a worrying picture for the region’s marine health.

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According to the Copernicus Marine Service (CMEMS), a heat map dated 22nd June 2025 shows significant sea surface temperature (SST) anomalies across the basin. Areas in dark red represent temperatures more than 5°C above average, with particularly intense warming noted in the western Mediterranean, including parts of the Tyrrhenian and Balearic Seas. Although Malta lies further east, the effects of the broader regional heating can still ripple through local ecosystems.

For a country like Malta – where the sea plays a vital role in both daily life and the economy – these rising temperatures are more than just a data point. Marine heatwaves can stress or damage delicate marine habitats, disrupt fisheries, and threaten local biodiversity, including native fish populations and seagrass meadows. These changes also impact tourism and recreation, as warmer waters can lead to more frequent jellyfish sightings and even algal blooms.

CMEMS provides free, open-access marine data, helping scientists and policymakers monitor the ocean’s health. Tracking these heatwaves is key to understanding how climate change is affecting the Mediterranean, allowing for better planning, management, and adaptation.

As Malta and other coastal nations face rising sea temperatures, continued investment in marine research and sustainable ocean practices will be critical to safeguarding our blue heritage.

Are you experiencing warmer-than-usual swims?