The steps of the Oval Basin in Cardiff Bay are being fenced off to stop people from gathering while coronavirus restrictions remain in place.
Last month police dispersed crowds who had gathered at the bay during the hottest weekend of the year to date.
In recent weeks people have been gathering at the steps in front of the Senedd as well as at the Oval Basin while the barrage has also been busy.
As Wales remains under alert level four restrictions current rules state that people must stay at home except for very limited purposes.
However this week the Welsh Government will be reviewing the restrictions and are expected to announce the end of the ban on all but essential travel with the stay-at-home rule changed to "stay local".
Cardiff council say that the fences, which will be in place ahead of the weekend, are being put in place following discussions with South Wales Police.
Officers have been spotted at the bay for several weekends in a row in a bid to ensure the public are adhering to coronavirus guidelines.
Last weekend more than 240 fines were issued by South Wales Police for Covid breaches – including to people attending birthday parties, camping trips, and travelling for exercise.
Council cabinet member for culture and leisure Peter Bradbury, said: "The improving weather over the last couple of weekends has seen increasing numbers of people congregating in Cardiff Bay.
"The vast majority of people are continuing to obey the rules but it's really important that we all play our part. The last thing any of us want is for all the good work to reduce the number of positive cases in Cardiff to be undone when we have come so far."
Similar fencing was erected last summer following a series of large gatherings on the steps of the Oval Basin.
Police were also required to disperse these gatherings and the council claim the subsequent clean-up operation cost taxpayers "thousands of pounds".
