As the summer is my favorite time of the year and that the beach is just 15 min bikeride away, I recommend Amager strand. Full of people usually though, but even so it gives a bit of an exotic touch to such a scandinavian city with the sea and the bright sand in the hot summer days.
An area in Copenhagen that has gotten quite a lot of attention because of its experimental public space and planning is Superkilen, a park in the north west of the city centre. Designed in a collaboration between the arts group Supeflex, Bjarke Ingels Group (BIG) and Topotek1, this park feature an eclectic mix of features, such as a fountain from Morocco, sculptures from Japan and large scale Russian signs. The area this park is located in, Nørrebro, is quite diverse, and the designers set out to reflect this by treating the park as ‘a world exhibition filled with interesting things’, and to represent the nationalities of every local resident. The park is divided into three areas: The Red Square, The Black Market and the Green Park. The Red Square is decorated with red-toned geometric patterns, contains cafés and feels modern and urban. The Black Markets’ ground are painted with white lines that creates almost aerodynamic patterns that curve around the benches and fountain. The Green park is a park for walking the dog, picnics and sports. Bring your camera as this area offers some great photo opportunities!
This is a lovely place to go if you want to enjoy the beach. It's also beautiful when its not bathing season. Go check out these little beach houses in beautiful colors. Also make sure to go for a walk in the forrest just next to the beach.