He's talking about her body temp, not the water temp. 13 c isn't _that_ cold a water temp for swimming. Plenty of people swim in 3 c water in the winter on Hamp

He's talking about her body temp, not the water temp. 13 c isn't _that_ cold a water temp for swimming. Plenty of people swim in 3 c water in the winter on Hampstead heath ... 13 c is however an insane body temperature.