Large blooms have been detected in the Gulf of Finland between Suursaari and Porvoo and in south western Finnish waterways.

In coastal waters, blue-green algae blooms are present in the eastern Gulf of Finland and in locations near Espoo and Sipoo as well as in the Hanko peninsular and archipelago.

Continuing hot weather is expected to further increase levels of the toxic algae. Water temperatures are also higher than usual.

Swimmers are advised to avoid areas affected by blue-green algae blooms and also to keep pets away.