And enough water in the Wien to even contemplate it :D
That being said, Donauinsel is still quite close to the center and I personally prefer the relative quietness and greenery around there to swimming in the canal.
Those pontoon ferry boats travel over 30 km/h on the Kanal.
https://bsky.app/profile/jamestheswift.bsky.social/post/3l47...
According to their FAQ it is very much possible to swim in the canal under certains conditions that they mention as well.
Because the Donau and Donau-insel are so long, you have many different ways to swim:
- swimming docks (alte donau) https://www.instagram.com/p/C_qMA8loXMv
- artificial beaches (CopaBeach)
- natural swimming (Neu Donau / Donau Insel) https://photos.app.goo.gl/d5iGqKP8uAjyYY81A
- Strandbad Angelibad for a roped off swim area with food and playgrounds
- Alte Hafenschenke where you swim on a tributary to the Donau
- swimming in a pool on a hill with a view of the city (Krapfenwaldlbad)
- swimming in a pool floating on the canal https://www.instagram.com/p/CiAb0gXufXx
- public pools cost only a few euros and have restaurants, slides, grass for picnics, sunbathing rooms (big rooms with no roof) https://www.heldenderfreizeit.com/wp-content/uploads/2020/07...
You've also got Sausalito-style restaurants on the water all along the river:
I normally don't like sweetwater for swimming and stayed away from the Danube for years. I was expecting the muddy smell and all, but this one's really great - I should've tried it earlier.
Especially gravel beaches near Hainburg (which is technically not Bratislava) or on the other side between Devin and Karlova ves.