21/01/2026
A reminder to take extra care around swimming spots across the Top of the South, especially after rain. Even when the sun’s out, water quality can take a while to recover. Thanks for helping keep our communities safe!
While we all wish for an endless summer of perfect swimming conditions, it’s worth mentioning the potential for the water quality at your favourite spot to change with the weather and/or environmental factors.
Rain is the most common reason for these changes, and if we happen to get a downpour, our recommendation is to avoid entering the water for at least 36 hours, but preferably 48. Even after the sun has come out, there is still a risk to swimmers.
We are well into our routine testing of water quality, and in most cases, the results are good across most spots – Moturoa/Rabbit Island, for example, remains a perennial winner for safe swimming.
Some sites are more vulnerable to high faecal indicator bacteria than others, and we have had several instances of higher readings in recent weeks. However, we have not encountered any new areas of concern. We’ll have signs up letting everyone know where issues exist.
You can also check the LAWA can I swim here page for the status of many popular swim sites around the region – lawa.org.nz/explore-data/swimming.
It's also timely to remind everyone to be aware of toxic algae in our rivers. Please be vigilant and familiarise yourself with what the toxic algae looks and feels like – particularly if you're a dog owner, a parent with toddlers, or are immuno-compromised.
This alga is natural and occurs during extended periods of low flow in rivers. It is black and forms gelatinous mats on the riverbed. It can also have a distinctive musty smell which is attractive to dogs.
If you see any of this alga, it would be wise to put your dog on a lead, and we strongly advise preventing your dog from scavenging, or playing in or near the water if the alga is present.
You can see the latest water quality and toxic algae results at tasman.govt.nz/swimming-water and tasman.govt.nz/toxic-algae-monitoring-results.