Dangerous stretches of reef exposed by the winter storms have led to a ban on bathing at Fistral Beach in Newquay
It will be put in place every day at high tide and last for four hours. There are fears it could be in place into the summer when the beach is packed with tourists and holidaymakers.
The storms caused damage running into thousands of pounds to Fistral Surf Centre and the RNLI station. However the impact on the beach itself is only now being revealed.
The RNLI is urging people not to go into the water at high tide when the rocks are hidden from view.
FIstral Beach lifeguards don't have legal powers to enforce a ban, and say if bathers ignore the red flag it's at their own risk.