I have been to this beach several times. This time it was in July. Now you might have thought it would be cold but it was a blue sky day and sunny, so it was quite warm for winter. Around 15 degrees C. But we wore long sleeve tops over our bathers just in case.
So, you have to arrive here at low tide. We approached a large rock on one end of the beach, where we could see others in their self-dug pools. The first pool I dug was cold. So I walked on the sand and at several points the sand was hot, boiling under my feet. We dug our hole there. We had a spade, and massed the sand at the edge of our hole patting it down strengthening the boundary. The sand was very hot to handle. We dug a trench to the cold pool I'd dug earlier, so the cold water mixed with the hot. Then we sat in it for a very long time. Oh the luxury, like a hot bath. It was great as there were lots of interesting people around to talk to. We also gave them advice, as by this time we considered ourselves hot pool engineers. It was a lot of fun, we loved it.