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North Sea Hits Record Warmth, Marine Ecosystems at Risk

9/3/2025

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Summary

Story summary

The North Sea experienced its warmest summer in 2025, averaging 15.7°C, two degrees above the long-term average.
The Baltic Sea's temperatures rose by up to 1.5 degrees.
Increasing marine heatwaves are affecting ecosystems and weather patterns.
The Federal Maritime and Hydrographic Agency (BSH) tracks these temperature changes weekly using satellite and ship data.

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Story summary

The North Sea experienced its warmest summer in 2025, averaging 15.7°C, two degrees above the long-term average.
The Baltic Sea's temperatures rose by up to 1.5 degrees.
Increasing marine heatwaves are affecting ecosystems and weather patterns.
The Federal Maritime and Hydrographic Agency (BSH) tracks these temperature changes weekly using satellite and ship data.