Beach webcams
Even though I'm not expecting webcams at clothing-optional beaches, this may still yield an interesting collection.
Four Mile Beach, Port Douglas, Queensland, Australia
Camera: https://tourismportdouglas.com.au/beachcam
Nearest weather station: BoM Low Isles weather observations
Tides: BoM tide predictions
Port Douglas is pretty much the gateway to exploring the Great Barrier Reef and Four Mile Beach runs alongside the road leading into town. On our first visit you could usually illegally shed the suit at the quiet southern end (and there was a local - I think - who seemed to do so when it was quiet). Nowadays most of the day sees a steady stream of walkers going all the way down and back again on two feet. The northern end has the lifesaving club and is busiest but there's access along most of its length. The crowd is all ages with attire choices to suit. Thongs seem increasingly popular among the younger ladies while Speedos are more common than the southern states. Stingers can ruin your swim as the water warms; I've only ever visited in September (springtime Downunder) before the stingers arrive. Crocodiles generally don't come this far south although others' mileage may vary. I found Cape Kimberly (just north of the Daintree River) more amenable to nude bathing (i e.: having the space to ourselves) and didn't end up being a croc's lunch but that may have been luck.