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Climate Monitoring

Ocean Temperatures Set New Record

Global average sea surface temperatures in June reached 20.98C, setting a new record. This surpasses previous highs from 2023 and 2024, highlighting a deepening global climate crisis.

28 · Wednesday, 1 July 2026

Global average sea surface temperatures reached an unprecedented 20.98C in June. This new record, reported by the Copernicus Marine Service, surpasses previous highs observed in both 2023 and 2024. The data underscores a continued and intensifying trend of ocean warming, which directly contributes to the global climate crisis.

This latest measurement highlights the persistent rise in marine heatwaves worldwide. As an EU climate monitor, the Copernicus Marine Service provides critical environmental monitoring data that consistently reveals significant temperature anomalies across the world's oceans. The consistent breaking of heat records for sea surface temperatures signals a deepening challenge for the marine environment and global climate stability. These sustained high ocean temperatures reflect the ongoing impact of global warming, with profound implications for marine ecosystems, biodiversity, and broader climatic patterns that affect weather systems globally. The continuous monitoring by services like Copernicus Marine Service is crucial for understanding the rapid pace of climate change and its specific effects on the planet's largest heat sink. The increasing frequency and intensity of these heat records serve as a stark indicator of the urgent need for comprehensive climate action, as the marine environment continues to experience unprecedented changes. The long-term consequences for ocean health and the services it provides are a growing concern amidst these rising temperatures.

What this means: The new June heat record for ocean temperatures confirms that the planet's oceans are absorbing a significant portion of excess heat, leading to profound changes in marine life and weather systems. This trend demands urgent attention to climate mitigation strategies and adaptation efforts to safeguard vulnerable ecosystems and human communities from the escalating impacts of the climate crisis.

Sources

  • [1] OrganisationCopernicus Marine Service