The sun shines but cloud forecast.
Chris Burton, of private forecaster Meteogroup said the best chance of sunshine would be in the south and east of the UK with a front moving into the west.
Cloud and occasional rain is forecast for places including Cardiff, Swansea and Aberystwyth.
Chairman of Tenby Chamber of Trade and Tourism, hotelier Chris Osborne, said yesterday: "We've had a good run with the weather. Easter was good and now it's been lovely this weekend.
"Tenby is looking glorious in the sun and it is jampacked with scooters for the 2014 scooter rally. I've never seen so many Vespas and Lambrettas."
Ashford Price, who runs the National Showcaves of Wales at Dan-yr-Ogof in the Upper Swansea Valley said: "As of 1pm on Sunday our visitor figures are 10% up on this time last year.
"I think the sun is behind it.
"The weather is definitely the deciding factor when it comes to tourism.
"Our ice cream sales have been up this weekend and people have smiles on their faces."
According to a forecast from the Met Office, Cardiff will see today's top temperature in Wales (15C), with showers and rain predicted across the nation until Wednesday and Thursday, when the rain will ease off to produce more overcast conditions and maximum temperatures of 13C.
Molly Marston, six, and Sophie Marston, four, enjoy the fine weather as <Bthey make their way around Margam Park Richard Swingler