Cyanobacterial reviews

During the summer 2024, national cyanobacterial reviews are published weekly on Thursdays from 20 June to 17 August.

Cyanobacterial review provides a comprehensive overview of the state of cyanobacterial blooms throughout Finland's inland and coastal waters and the Baltic open sea area. Monitoring is organised jointly by the Centres for Economic Development, Transport and the Environment, municipal environmental officials and the Finnish Environment Institute (Syke).

Cyanobacterial reviews summer 2024 (sttinfo.fi)

• The number of blue-green algae observations has increased slightly in inland waters and on the coast of Southwest Finland 2024-08-08
• Windy and rainy weather has curbed blue-green algae blooms in lakes and sea areas 2024-08-01
• Relatively small amount of blue-green algae have been observed in inland waters, but there are plenty of observations on the coast and in the open sea 2024-07-25
• Blue-green algae observations have increased in coastal and open sea areas 2024-07-18
• Slight increase in blue-green algae observations in inland waters 2024-07-11
• The blue-green algae situation has remained stable since last week, unstable and windy weather slows down the growth of blue-green algae 2024-07-04
• Warm weather has increased blue-green algae observations in inland waters, on the coasts and in the Gulf of Finland area 2024-06-27
• Earlier-than-usual observations of blue-green algae in marine areas, situation in inland waters typical for early summer 2024-06-20
• In sea areas, the risk of extensive blue-green algae blooms remains significant 2024-06-10

Cyanobacterial reviews summer 2023 (sttinfo.fi)

• Blue-green algae situation has calmed down at sea and in lakes 2023-08-31
• Reduced wind increases surface blooms of blue-green algae 2023-08-24
• Blue-green algae situation has remained stable both in lakes and at sea 2023-08-17
• Strong winds have dispersed blue-green algae surface blooms in inland waters and at sea 2023-08-10
• Unstable weather has kept the blue-green algae situation calm in lakes, surface blooms observed at sea 2023-08-03
• The blue-green algae situation has deteriorated in marine areas and inland waters 2023-07-27
• Windy weather has restrained blue-green algae blooms 2023-07-20
• Warm weather has increased the number of blue-green algae observations in inland waters and sea areas 2023-07-13
• Cool and rainy weather has kept the blue-green algae situation calm on lakes and at sea 2023-07-06
• The blue-green algae situation has deteriorated significantly in inland waters and coastal areas, also abundant blue-green algae in sea areas 2023-06-29
• Blue-green algae observations increased in inland waters and at sea during Midsummer week 2023-06-22
• Blue-green algae observations increased slightly in inland waters and coastal areas 2023-06-15
• The blue-green algae situation calm both in the Baltic Sea and in lakes 2023-06-08
• Summer algae forecast: Warm and calm weather conditions can lead to powerful blooms of blue-green algae in the Baltic Sea 2023-06-01