Two women rescued from Sully Island were caught out by high tides "despite doing everything right".
Karina and Linda had checked tide times and followed safety advice from the RNLI before visiting the island with their dogs, Teddy and Charlie, on Wednesday afternoon.
High tide was expected at 8pm, so they began making their way back to the causeway at just before 5pm.
But they found the causeway was already impassible - with the tide just touching 11 metres three hours before the next peak.
The RNLI's water safety team - based nearby - used a loudhailer to reassure the pair and told Karina and Linda to stay put while the Coastguard scrambled for help.
The inshore lifeboat from Barry Dock arrived to safely return both ladies - and their dogs - to the mainland, while being advised about tide times and heights.
The RNLI said the pair had agreed to share their story to help raise awareness of how important it is to check not only the time, but also the height of the tides when visiting Sully Island.
Bill Kitchen, lifeboat operations manager at Barry Dock, said: "Karina and Linda did everything we would usually advise, but this is a really good reminder that it’s not just about when the tide comes in, but how high it is on any particular day."
"We’re very grateful to them for allowing us to share their story, it could genuinely help prevent future incidents."
Later that evening, the Barry Dock crew were called out again to help a paddle boarder who was heard shouting for help off Cold Knap.
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