On the lake in Pregny along from Jardin Botanique

One of the more tranquil and close "beaches" to Geneva is opposite and along from the Jardin Botanique.  I don't know the name of this little park but in has a good buvette and restaurant. The Restaurant Reposoir serves drinks, ice cream, snacks and meals on some very comfy sofas.

The beach  is some sloping concrete but none the less you can paddle.

I've added a new tag Lake Side for playgrounds on the lake.