Keith Rose: This beach on the outskirts of Reykjavik has a large sandy beach and smaller pool connected to the sea. The special feature is that it is warmed with geothermal heat. There are large changing rooms, hot soaking pools and it is free, at least it was when I was there in 2009.
Why not take some friends? We can help you organise a swim and make it easy for
swimmers to join you. You can easily publish your swim as an event on Facebook too.