Tjuvholmen Sjøbad, public swimming area in Frogner, Oslo, Norway

Tjuvholmen Sjøbad is a small public swimming area on the Tjuvholmen peninsula in Frogner, Oslo, Norway, located right beside the Astrup Fearnley Museum of Modern Art. It consists of a compact urban beach with a wooden pier, ladders for entering the fjord, and a modest strip of sand and rocks where people lay out towels in the warmer months.

The peninsula of Tjuvholmen was completed as a new development around 2010, transforming a former industrial waterfront into an upscale residential and cultural quarter. The small beach beside the contemporary art museum was created as part of this renewal, giving the public access to the fjord where shipyard activity once dominated.

The name Tjuvholmen means "Thieves' Island," a reminder of the peninsula's earlier identity before it became a modern residential and cultural district. Today the swimming area functions more as a social hangout than a traditional beach, with office workers stopping for a quick dip, families spreading picnic blankets on the rocks, and sauna-goers warming up before a cold plunge into the fjord.

The beach gets crowded on sunny July afternoons, so mornings or early evenings in May, June, and September feel more relaxed and allow you to find a good spot near the water. There are nearby kiosks for coffee and snacks, and the site is easy to reach on foot from the city center along the harbor promenade.

Visitors often miss the wooden pier extending beside the beach, where you can sit inches above the water and watch electric ferries and small boats glide through the harbor. The water quality has improved so much over the past two decades that swimming here in late summer is now a normal part of everyday city life, not a novelty.