'Don't risk your life at sea, like our boy Anthony'
"When I took that initial phone call, I screamed 'no, not my boy. Why did they take him?'"
In 2014, 23-year-old Anthony Miller drowned in the sea off Cornwall after a late night swim. He'd been drinking.
Friends and family say he was funny, outgoing and someone who "cheered you up when you were down".
"I wake up, he's my first thought. I still cry myself to sleep," his mum Tracey Miller tells Newsbeat.
"I have my memorabilia of him, but I don't have him."
August is the month of the most fatal and non-fatal coastal accidents in the UK and the busiest for lifeguards and the coastguard.
There are more lives lost each year among 18 to 30-year-olds than in any other age group.
Anthony's sister Kaylee Miller now wants others to think twice before taking risks at sea, especially after drinking.
"It seems like a really good idea at the time and it might be fun, but you never know what the water's really like," she says.
"Even if it seems safe, there's always things like a rip tide which can take your life and it will destroy your family."
Despite warnings, the amount of coastal injuries and deaths has remained steady over the last five years.
In that time, around 190 people have lost their lives each year, through accidents.
Shannon Howard, Anthony's friend, says the 'devastating affect' his death has had on those who knew him is "unbelievable".
"It's been three years but not a day goes by we don't think about it. We had to say goodbye to to one of the greatest people we've ever known."
Last August, four people in their late teens and early twenties lost their lives after falling off a sandbank into strong currents in Camber Sands in Sussex.
This summer the RNLI has started a new national campaign telling people how to deal with the shock of falling into cold water.
For the first time, it has changed their advice on what people should do, if they fall in.
People are told to reduce cold water shock by floating on your back, with your chin up and arms wide for a minute, until the heartbeat slows.
Only then are people advised to wave an arm and shout for help.
Temperatures in UK coastal waters do not get much above 16 degrees Celcius, even in the summer, which is similar to what comes out of a cold tap.
But Anthony's friends and family want people to avoid getting into dangerous situations in the first place.
"Think twice before you do something," warns his friend Matt Wicks.
"Some days, I just think 'why did you do it?'. He should still be here making us all laugh."