58-62 water would be within my comfort range for a refreshing dip if I'm overheated or overworked, or it would even be fine for a short swim. Some here would certainly disagree though and I would not be happy if trapped into longer exposure.

I'd certainly prefer 18-20 Celsius for a day at the beach. Ocean water will go a few degrees over 20 here but only for about two months of the year. Not even refreshing for me if it goes too high over 20. 20 Celcius = about 68 F.

With great power comes Awesome irresponsibility.