Beach goers have been urged to take their rubbish home with them after 23 tonnes had to be collected off Brighton beach over the weekend.
Brighton and Hove City Council said despite installing 60 extra litter bins the beachfront was left covered with rubbish.
It has also employed 20 extra seasonal staff to cope with the increase in litter.
Councillor Ollie Sykes said the the level of litter was “astonishing”.
“Last weekend [it] was wonderful that so many people came, but very depressing that the beaches looked so awful at the end of it,” he said.
“The beaches looked like landfill sites. They [the beach goers] wouldn’t do this to their own streets and their own back gardens.”
He said the 23 tonnes figure only included litter left on the beach and not rubbish that had been placed in the bins.
“If someone leaves litter on the beach then other people do as well,” he added.