... 32 degrees, that's amazing. Are you saying that it was heated by the sun?
When I undertook a road trip to Cooktown, some years back, part of the mix was an attempt to swim a good distance at every 50 metre pool along the way. And there were many. Some set in wonderful picturesque surroundings. The thing was that all the pools are set at 27 degrees, which amazed me. Even pools as far north as Cairns. North Queenslanders told me they struggle with water temperatures lower than that, having been conditioned.
The sea temperature rarely gets above 23 degrees off the Sydney coast, even at peak season, and gets comfortable, for distance, from about 21 degrees.