The scandinavian summer can be awful, we have had everything from 30 degrees celcius, sun, 10 degrees, heavy rain, wind, storm and back to warm weather with sun. Yesterday in the mist of fixing the new house my brother-in-law decided that we needed to go swimming. I have not touched the ocean for ages in Sweden, but yesterday I did.
Let me tell you this, it was sooooo cold, but I got used to it after a minute or two. I recommend a glas or two of wine before entering the Oresund strait. Trust me, it helps.
My shorts are from COS