[louis]

Surfers paradise in in Queensland gold coast Australia, but I would be surprised if the place you are referring to would be there, speedos are totally the norme at surfers paradise beach, the beach area is full of speedo shops, and even the SLSC ,S P beach all wear speedos.
If the sign is there it probably is on or near the surfers section off the beach,
Speedos are not recommended for surfing because of sand accumulating in the suit, thus shorts permits sand to more easely evecuate from the surfers shorts.