[rvrs]

What's the app called? I'd like to reference it to see if I can swim when I visit :D

[egman_ekki]

You can see it in the By & Havn app (City & Harbour in Danish): https://byoghavn.dk/ny-app-til-alle-os-der-elsker-koebenhavn...

Also in Badevand app: https://kbh.badevand.dk/

[coreyh14444]

Here you go: https://www.badevand.dk/

For the record, I've only seen it red once or twice all year, so the odds are already in your favor. And at the more popular swim spots, there will be a physical sign with a little green or red light.