The sand importation is part of Conwy County Borough Council’s Waterfront project, which is providing sea defences and improvements in Colwyn Bay, funded by the Welsh Government and European Regional Development Fund.
It will take place 24 hours a day, seven days a week and should last for a period of up to four weeks, depending on the weather.
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Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Sunny and bright spells for most of us this afternoon, feeling pleasantly warm.
North Wales Fire and Rescue Service say incidents of deliberate fires are more common during the school holidays.