The RNLI is warning young people who participate in 'tombstoning' that they are taking their lives into their hands.
They say it's only a matter of time before someone is killed or seriously injured jumping off Wales' cliffs.
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Some very wet weather will sink it's way south and east overnight, with mist and murk developing around coasts.
The Wales Rugby squad are currently in Switzerland at a gruelling conditioning training camp ahead of the World Cup in September.
Wales joined the rest of Britain today in falling silent to remember those who were killed in the July the 7th bombings.