Algae bloom in the Baltic Sea in full swing
- Martin Bez
- Aug 1
- 1 min read
Hauke Schmidt · 31.07.2025
Satellite image from 20 July, at this time most of the Baltic Sea was cloud-free. Green areas indicate a closed algae carpet on the surface. Deeper algae accumulations are shown in blue. Clouds are shown in dark grey
The Baltic Sea is in such a bad state
Contact with the algae harbours health risks
The algal bloom also harbours direct health risks for swimmers and other water sports enthusiasts. The blue-green algae, which are actually cyanobacteria, can release toxins that remain in the water for several days. Contact with contaminated water can lead to skin irritation, eye complaints, nausea and diarrhoea.
To avoid health problems caused by the algal bloom:
Do not swim in discoloured water or in areas with visible algae accumulation.
Do not allow pets to swim in or drink from such areas.
Follow the recommendations of local authorities regarding water quality.
Keep small children away from affected waters.
Shower thoroughly after swimming.
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