Abandoned beer bottles, food wrappers, nappies, plastic bags and other trash have left popular parks, beaches and waterside walks filthy after the hottest day of the year.
People walking around the Cardiff Bay barrage and on Barry Island on Tuesday evening and Wednesday morning were left appalled by the rubbish left behind.
Trash was also left strewn around parks like Pontcanna Fields in Cardiff and parts of Swansea.
Visitor spots were busy on Tuesday as temperatures hit 21C on the hottest day of the year so far.
Bins were pictured overflowing with litter and empty bottles and cans of alcohol were left scattered on the steps of the Senedd on Wednesday morning.
One woman who lives in the Bay told WalesOnline: "I live in the centre of Cardiff Bay and I am constantly witnessing people publicly urinating on my doorstep, in the car park, outside the shops, it’s disgusting.
"The amount of rubbish and glass that had been deliberately thrown on the ground is concerning.
"No thought to how it could affect dogs especially as the glass can stay in their paws. There are also so many families, children and people on bikes who use the area."
There reports on Tuesday evening of a large number of groups congregating in Cardiff Bay around the Senedd.
Some footage shows a large police presence and there were reports of arrests.
It was the second day a large amount of rubbish had been left with a major clean up operation.
On Tuesday, Cardiff council said their teams cleared a "sizeable" amount of rubbish from the area and urged people to follow coronavirus rules.
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There were also pictures from Barry Island of empty cans, plastic buckets and nappies being washed up on the beach.
The beach was packed on Tuesday as temperatures reached 21°C, but there was anger about the amount of rubbish that was left behind.
One walker said: "They left all their rubbish to get washed away. Bottles, toys, masks, towels, and of course nappies. I litter picked and the bins were vastly overflowing."
Met Office meteorologist Alex Burkill said on Tuesday: "It was Wales' warmest day of the year so far quite easily and a very warm March day. "
Wednesday is forecast to be equally warm with temperatures around 21 or 22°C.
