South Wales Police says people are continuing to visit Gower despite restrictions on movement being put in place to tackle the coronavirus outbreak.
Under the restrictions travel is only permitted when absolutely necessary.
But police say people are still visiting the area for walks, cycling and even surfing despite the country being in lockdown to stop the spread of the virus.
In a Twitter post, South Wales Police also said people have been swimming off the pier in Mumbles, despite the restrictions.
HM Coastguard have received a number of calls reporting groups of people gathering on beaches.
Pete Mizen, assistant director for HM Coastguard, said: ''The rules are very simple and can be found on the UK Government website. Stay at home. The risk of spreading coronavirus is huge and while you might be okay, the person you give it to may not.
''If you get into trouble and have to call 999 and ask for the coastguard, you're then putting frontline emergency responders at risk of COVID-19 too.''
Since then Snowdonia National Authority Park Authority has announced the mountain has been closed to the public.
Coronavirus: Everything you need to know