Mark Govier is from the Merthyr Tydfil Sailing Club, which uses the Pontsticill reservoir as its base for training.
An investigation is currently underway the reservoir after a man's body was recovered from the water.
Mr Govier says that while swimming in reservoirs can seem quite tempting, the cold water can be dangerous.
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Howley has returned to Wales to assist with an investigation in relation to a potential breach of World Rugby betting regulations.
The grade II listed building dates back to the 15th century and was used as a court house. It was turned into a tearoom over 50 years ago.
It'll be yet another beautiful day with plenty of sunshine around but there will be a little bit more cloud around this afternoon.