Walked to Cathedral Bay in the morning. Drove to Hot Water beach in the afternoon - which is exactly what it is. Two hours before and after low tide you can dig a hole in a particular area and it fills with hot water. We were like kids again with our spade!! We dug a hole and wallowed for ages - it was great. There was quite a party atmosphere sharing our hole with strangers and sometimes it was so hot we had to shift along a bit!