Answers from Our Experts (1)
You haven't lived in Stockholm if you haven't thrown off all your clothes and jumped from the quay outside the town hall on at least one summer night. It actually is a very popular spot, but the island Långholmen (get off at the Hornstull metro station) has a much more official status as the citys number one beach.
From Hornstull you can also go down to Tantolunden, a long park with a lot of small beaches and bridges where you can take a bath.
If you have a car, or a bike, there's also Hellasgården and Söderbysjön just south of the city. But they're lakes.