One can always use the pools at Alcala. They are tide dependent but safe and also have a life Guard on duty. Watch the jelly fish though sometimes but they have warnings and close the pools if they are around. When that happens you can use the adjacent beaches and or have an aperitive in the beach bar there. Another nice and safe place to swim there is the harbour of course.
Many years ago we witnessed someone swept off it, nothing anyone could do for them. You can view it from the opposite side if you walk around the back of the Barcelo Santiago. Would never go near it again, so dangerous.
When I last visited a number of years ago I was informed that 7 unfortunate people had drowned,the majority were Germans I think.Very sad,but visitors often do not realise the power of the sea especially in Winter.
Not everyone who has been swept away and drowned were swimming in the pool at the time . Walkers have been swept away too , the gates are locked to protect visitors from themselves. At other times of the year the pool is safe and popular , perhaps it would be better if the sign was removed and the steps destroyed , so no-one could ever go down there.