Copenhagen's Kastrup Sea Baths, designed by White Arkitektur AB and built in 2004, are a delighful invitation to take a dip. And we needed enticement the day we visited in August, during a month in which the Danes had been complaining about their cooler-than-usual summer. There was one other couple at the baths, but they'd already been in the water. The lifeguard on duty was bundled up in a fleece jacket and scarf. It was only 16 degrees, but we had to go in, as we'd come all the way from New Zealand.
Besides, the baths themselves are fantastic - in reality they are not baths so much as a circular, sheltered platform at the end of a wharf that extends from the beach. (It's a short ride - about 15 minutes - on Copenhagen's new subway from the central city to a stop that's a few minutes' walk from the beach). The structure contains changing rooms and culminates in a diving platform.
The great advantage of the circular timber structure is that there is always somewhere to shelter from the breeze.
From the top of the diving platform, the view north towards central Copenhagen also takes in some of the offshore wind turbines. The images below show some of the other points from which swimmers can dive off the structure.
The clear panel you can see in the image below contains outdoor showers where swimmers can rinse off with a view of the Oresund Bridge leading from Denmark to Sweden as well as Santiago Calatrava's 'Turning Torso' residential tower in Malmo across the water.