Some of the world's best sailors will hit the waters of Cardiff Bay this weekend for the fifth stage of the Extreme Sailing Series.
The event is returning to the capital for the third year for its UK leg which will feature 40 catamarans. The race travels to some of the world's most iconic places including St Petersburg, Singapore and Sydney.
Olympic and America's Cup sailing star Sir Ben Ainslie is among competitors taking part in the event which runs until Monday. He skippers the British entry JP Morgan BAR.
Novice sailors have been taking to the water off Mumbles today to try sailing, windsurfing and stand-up paddle boarding. Around 80 beginners took part.
On hand to give tips and advice was Welsh Paralympic sailor Stephen Thomas - originally from Bridgend. He was part of the a team that finish fourth in the Sonar class at London 2012.
The waters of the Menai Strait between Gwynedd and Anglesey have been busy with hundreds of sailing vessels today.
The race round Puffin Island has been happening - one of the highlights of the Menai Strait Regattas - and it is proving to be a pretty popular draw for sailors and land-based visitors alike.
Today's race round Puffin Island is one of the highlights of the two-week Menai Straits Regattas.
The four-hour race started from Beaumaris and is sailing north towards the uninhabited island, off the eastern tip of Anglesey.
There, racers can hope to catch a glimpse of local wildlife, including guillemot, razorbill, grey seals and puffins.
On our main programme and website all this coming week we'll have a series of reports about a tall ship that's sailing around the world visiting 30 countries on all 7 continents. The Crew is led by 21year old a injured soldier Kyle Baker from the Chepstow.
Cardiff's Olympic silver medallist has won her latest quest in sailing. Hannah Mills and her team crossed the line first in the Extreme Sailing Series Championship. The achievement comes just four months after London 2012. Our Correspondent Joanna Simpson reports.
The 5th World Robotic Sailing Championships are taking place in Cardiff Bay this week, and today there's a special open day.
The boats can navigate themselves, and don't need need to be controlled from land, as James Wright reports.