Sam Haycock, aged 16, died on Friday, May 28 after visiting Ulley Country Park with friends on the day the Y11 student left Oakwood High School in Rotherham.
A major search and rescue operation involving multiple agencies was launched when Sam’s disappearance in the water was reported.
His body was recovered a number of hours later.
Rotherham Council is urging people to stay away from open water as high temperatures are forecast to continue over the coming weeks.
The council’s Cabinet Member for Social Inclusion, Councillor David Sheppard, said: “This was a very tragic incident and sadly this could happen to anyone, of any age, adult or child.
“No matter how hot the weather is and how tempting it is to take a dip, the water can be very cold. No matter how strong a swimmer you are, you are susceptible to cold water shock.
“Lakes, pools, rivers and quarries have many hidden dangers, and you can very quickly and easily get into trouble. Sadly, we have seen too many lives lost in these circumstances. We must all appreciate these risks and look out for each other.”
Area Manager Stewart Nicholson, of South Yorkshire Fire & Rescue, said: “Too many young lives are needlessly lost in open water every year. Our message couldn't be clearer - please, please stay out of the water and stick to swimming pools or organised swimming groups instead.”