The RNLI says more people lost their lives on the Welsh coast than in cycling accidents.
In total, 17 people died last year, and 65 were rescued by lifeboats and lifeguards.
Since 2010, a total of 70 people have died around Wales' coast.
Adult men accounted for 73% of them.
Today the RNLI launches its Respect the Water campaign, aimed especially at men, to try and bring these figures down.
Nationally, an average of 160 people die at the coast each year. The RNLI is aiming to halve accidental coastal deaths by 2024.
More top news
Michael Wheeler, 22, admitted causing Sophie Taylor's death by dangerous driving during an alleged car chase.
Cloud will thicken from the south, with mist and fog reforming in many areas towards the end of the day. Maximum temperature 9 deg C.
Property tycoon Peter Morgan allegedly strangled the mum-of-one Georgina Symonds with a ligature in January 2016.