South Australia's algal bloom - all your questions answered

How can you check beach conditions before you head out? Can you still go fishing? And what is being done to restore and protect our marine environment? Read the FAQs below to learn more.

An algal bloom happens when tiny plant-like organisms in the water – called algae – grow very quickly and in large numbers. 

The algal bloom that has impacted areas of the South Australian coast was caused by a naturally occurring marine algae called Karenia. It’s part of a group called harmful algal blooms (HABs), which form when ocean conditions – like warmer water and nutrient levels – let algae grow quickly and spread.

While Karenia isn’t toxic to humans, it has been deadly for marine life – affecting more than 400 species of fish, sharks, rays, shellfish, seahorses and other creatures. 

This bloom has had a serious impact on marine life and the industries that rely on it – especially fishing, aquaculture and tourism. 

Water testing shows the vast majority of South Australia’s coastline continues to record zero or low levels of the Karenia since February 2026. 

South Australian beaches can be still be enjoyed, but it’s important to stay aware of conditions. Steer clear of the water if it looks off. Avoid swimming or surfing in water that is abnormally-coloured, foamy, or where there’s dead marine life. If in doubt, stay out. 

Your pet can still enjoy the beach too  - just keep them out of abnormally coloured water and away from dead fish.

Some people may experience symptoms such as coughing, sore throat, itchy eyes or skin irritation when exposed to affected water or sea spray. 

If symptoms occur, leave the area and seek medical advice if needed.

For further health advice, visit the Algal Bloom health advice webpage. 

Check water testing results  

You can see the latest water testing results on the algal bloom website, covering seven regions across the state.  

View live beach conditions 

The website also provides live webcam views of sea and beach conditions at a series of locations across the South Australian coastline. These can help you get a sense of current conditions but should be used as a guide only.  

There is a comprehensive plan in place, informed by science, to boost fish stock recovery in Gulf St Vincent and Spencer Gulf.  

Fishing restrictions continue to be reviewed based on updated assessments of fish stocks affected by the algal bloom. You can check current limits here: Fishing limits quick lookup - PIRSA 

Free boat ramp access is available, along with a 50% discount on recreational boat and trailer registration through to 1 December 2026, making it easier to get out on the water.  

Work is underway across multiple organisations to protect our environment for the long term. This includes shellfish reef restoration, seagrass restoration and targeted breeding programs for threatened and vulnerable marine species.  

An Office for Algal Bloom Research is being established to undertake vital long-term research into the formation, spread and impact of algal bloom events.  

Investment is also being expanded to strengthen real-time water quality monitoring and forecasting, and early detection.  

Visit the SA Government Algal Bloom website algalboom.sa.gov.au for the most up to date information and sign up for the newsletter.