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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Some locally heavy showers are possible overnight, particularly in the east, where some thundery downpours are possible.
Wayne Pivac praised Scarlets' attacking style as they secured the Guinness PRO12 title with a stunning 46-22 success against Munster.
Scarlets sealed a famous victory at the Aviva Stadium in Dublin with an emphatic 46-22 victory over Munster in the Guiness PRO12 final.