In the concluding Welsh festive derby the Ospreys are heading down the M4 to Newport to face the Dragons. The Swansea side will be looking to build on their Boxing Day win over the Scarlets. The Dragon will be looking to bounce back from their 12-10 defeat at the Blues 3 days ago.
Kick off 16:15
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It's judgement day at the Millennium Stadium as Cardiff Blues take on the Ospreys and the Newport Gwent Dragons face the Scarlets.
Showers expected throughout the day especially in the north. Drier and brighter elsewhere but cooler than in recent days.
Most places will become dry overnight, although it will remain generally cloudy with patches of hill fog.