Fjærholmen
10 km away from Tønsberg out on an island, reachable by bus or car
Swim in the Oslo-fjord. The temperature in the sea will normally be 18-22 °C 64-72 °F. The same place will also be the area where all have their private sailing boat and if you are lucky - maybe somebody will bring you along for a sailing tour. Just be brave and ask!
