Algal Bloom Update – South Australia

24 Oct 2025

The South Australian coastline has recently been impacted by a naturally occurring algal bloom of the Karenia species. While algae are a normal part of our marine ecosystem, this particular bloom can be harmful to fish and some marine animals. Detected initially along the Fleurieu Peninsula, it has now spread to affect roughly a quarter of South Australia’s coastline.

For the latest official updates, visit the Government of South Australia Algal Bloom Update.

AusTriathlon understands that athletes and clubs may have questions about how the bloom could affect upcoming triathlon and multisport events. Together with local Race Directors, we’re closely monitoring the situation in consultation with health authorities, government agencies, and other aquatic sport partners.

The safety of our athletes, volunteers, and the wider community remains our highest priority. Every event will undergo water risk assessments to ensure racing conditions are safe, and contingency plans are in place should swim legs need to be modified. Supported by the Office for Recreation, Sport and Racing and Surf Life Saving SA, local Race Directors and Technical Officials are also receiving additional training to strengthen on-site safety measures.

South Australian beaches can still be enjoyed but it’s best to stay away from foamy or abnormally coloured water. If exposed, rinse off with fresh water, and those with asthma are encouraged to keep inhalers on hand as a precaution.

South Australians will be able to access daily reports on algal bloom conditions at popular beaches through Surf Life Saving’s Beachsafe app – backed by record Surf Life Saving beach patrols – as part of the State and Federal Government’s Algal Bloom Summer Plan.

The free app, and companion website Beachsafe.org.au, will provide South Australians with easy-to-understand information to help them make informed decisions about how best to enjoy the beach.

Members of the State Government’s beach clean-up crews will conduct visual algal bloom inspections at 23 locations across the metropolitan and southern coast each morning – starting at North Haven all the way down to Goolwa.

Based on these inspections, the Beachsafe app and website will let the public know three clear pieces of information:

  • If the beach is clear of abnormal foam
  • If the water is discoloured or not
  • What time the beach was last cleaned

Download Beach Safe for Apple or Android Devices

AusTriathlon is committed to transparent communication and will continue to provide timely updates as the situation evolves. Most importantly, we will be racing this season, and your continued support for local events is vital to keeping triathlon and multisport alive across South Australia.

We’d love your input
As we plan the season ahead, we’re asking South Australian members to complete a quick survey to share your thoughts on open water swimming and local event conditions this summer. Your feedback will help shape how we deliver a safe, enjoyable and successful triathlon season for everyone.

👉 Complete the SA Member Swim Survey Here

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