There has been a "major increase in participation" in sport since London 2012, according to Sport Wales.
Welsh athletes won a record seven medals at the Olympics and 15 at the Paralympics last summer, and the organisation which oversees sport here says there has been a legacy left.
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Breezy overnight. It will become fairly cloudy as the night progresses.
It should turn cloudier through the early hours with some patchy drizzle and some hill fog too.
It will be a breezy day with variable amounts of cloud and some bright or sunny spells.