Update: Microalgal Bloom and Beach Safety

Published 10th April 2025
Residents and visitors are urged to exercise caution on Fleurieu beaches

The City of Victor Harbor remains in close contact with government agencies in relation to the current algal bloom event affecting local waters.

State and local authorities continue to monitor the algae bloom event closely.

The identified algae species is Karenia mikimotoi. Exposure to the algae, including through breathing in algae particles (or aerosols) can cause general allergic-type responses including symptoms such as respiratory and eye irritation or skin rashes in some people, while ingestion could cause stomach upsets or flu-like symptoms. These systems symptoms disappear when the exposure stops or following washing in clean water.

Current advice is that a beach closure is not necessary for areas from Encounter Bay to Hayborough. However, SA Health advice is to avoid contact with water that appears discoloured or has an unusual smell.

Further to this, SA Health has advised that fish caught live are safe to eat. However, dead fish or cockles should not be taken for human consumption due to issues associated with decomposition or spoilage.

The most up-to-date public health information is available at SA Health’s Water Quality Alert webpage.

The Environmental Protection Authority (EPA) is the lead agency and is working closely with other agencies, including PIRSA Fisheries and SA Health, to manage the situation and take water samples to assess potential risks.

Cause of the Microalgal Bloom

In late March the EPA has identified Karenia mikimotoi as the cause of the current algae bloom. This is likely due to a marine heatwave with sea surface temperatures higher than usual.

Status of Local Beaches

  • Waitpinga Beach and Parsons Beach – Re-opened
  • Encounter Bay to Hayborough – Open

View the latest public health advice