Kate Middleton looks nautical in stripes as she joins Sir Ben Ainslie at SailGP in Plymouth

Kate Middleton looked ready to embrace her competitive side as she stepped out in Plymouth to take part in a catamaran race.

The Duchess of Cambridge, 40, donned a wetsuit as she prepared to join Sir Ben Ainslie at the Sail Grand Prix (SailGP) competition in Plymouth.

The Duchess arrived earlier today wearing a dark jumper with white nautical stripes and already looked preparedto set sail. 

She paired the jumper with white linen shorts with gold buttons, from Holland Cooper and costing £199. 

The Duchess of Cambridge paired her look with a pair of brilliant white Superga plimsolls costing £59 and simple huggie gold earrings.

Kate looked ready for action in her GBR wetsuit as she got ready to join the Great Britain crew at the SailGP event in Plymouth

Kate looked ready for action in her GBR wetsuit as she got ready to join the Great Britain crew at the SailGP event in Plymouth

The Duchess was all smiles as she got ready for the race, despite fairly dreary weather in the background

The Duchess was all smiles as she got ready for the race, despite fairly dreary weather in the background

The Duchess of Cambridge was led by Sir Ben Ainslie (right) to race against New Zealand in a friendly 'Commonwealth Race'

The Duchess of Cambridge was led by Sir Ben Ainslie (right) to race against New Zealand in a friendly ‘Commonwealth Race’

The Duchess stopped to chat to a sweet little girl wearing a blue dress and tan sandals

The little girl looked like she had said something to amuse Kate, who gave her a cheeky smile

The Duchess stopped to chat to a sweet little girl wearing a blue dress and tan sandals – while Kate crouched down and smiled at her

Kate looked ready for action as she stepped out of the cockpit of a catamaran to get ready for her race against New Zealand

Kate looked ready for action as she stepped out of the cockpit of a catamaran to get ready for her race against New Zealand

Kate met with children involved with the 1851 Trust, the official charity of SailGP, and let one of the young children try on her GBR hat

Kate met with children involved with the 1851 Trust, the official charity of SailGP, and let one of the young children try on her GBR hat

The Duchess kept her cool with windswept hair as she returned to land after the race

The Duchess of Cambridge swapped her white linen shorts for navy blue shorts

The Duchess kept her cool with windswept hair as she returned to land after the race, slipping her Supergas back on and carrying her wetsuit

The Duchess joined the Great Britain SailGP crew on the catamaran captained by Sir Ben Ainslie, whose name is on the boat

The Duchess joined the Great Britain SailGP crew on the catamaran captained by Sir Ben Ainslie, whose name is on the boat

The Duchess stood alongside her crew and waved to the shore at the end of the race

The Duchess stood alongside her crew and waved to the shore at the end of the race

Kate got to work alongside her crewmate Jensen as the catamaran picked up speed

Kate got to work alongside her crewmate Jensen as the catamaran picked up speed

The crew, who raced in a catamaran promoting the 1851 Trust's Protect Our Future programme, got to work as speeds picked up

The crew, who raced in a catamaran promoting the 1851 Trust’s Protect Our Future programme, got to work as speeds picked up

The Duchess of Cambridge (second from right) threw herself into the race despite being an honorary member of the team

The Duchess of Cambridge (second from right) threw herself into the race despite being an honorary member of the team

Sir Ben Ainslie gave the thumbs up as he prepared to do what he does best, leading the Great Britain crew in the catamaran race

Sir Ben Ainslie gave the thumbs up as he prepared to do what he does best, leading the Great Britain crew in the catamaran race

The Duchess of Cambridge had a huge smile on her face as she prepared to set sail against the New Zealand SailGP team

The Duchess of Cambridge had a huge smile on her face as she prepared to set sail against the New Zealand SailGP team

The Duchess donned her helmet, sunglasses and a microphone as she waited for instruction from her captain, Sir Ben Ainslie

The Duchess donned her helmet, sunglasses and a microphone as she waited for instruction from her captain, Sir Ben Ainslie

Earlier in the day, the Duchess rolled up her sleeves and got busy with a seagrass planting activity

Earlier in the day, the Duchess rolled up her sleeves and got busy with a seagrass planting activity

Kate, a mother-of-three, shared a joke with the young boy she was planting seagrass alongside

Kate, a mother-of-three, shared a joke with the young boy she was planting seagrass alongside

Kate also had a chat with an Australian SailGP driver, Tom Slingsby, as she stood in the cockpit of the catamaran F50

Kate also had a chat with an Australian SailGP driver, Tom Slingsby, as she stood in the cockpit of the catamaran F50

The Duchess's face was the picture of concentration as she prepared to show her competitive side during the race

The Duchess’s face was the picture of concentration as she prepared to show her competitive side during the race

Kate chatted to Hannah Mills OBE, a competitive British sailor and two-time world champion of the Women's 470 class, ahead of her race

Kate chatted to Hannah Mills OBE, a competitive British sailor and two-time world champion of the Women’s 470 class, ahead of her race

She might be in it to win it, but Kate still beamed for royal fans as she prepared to set sail

She might be in it to win it, but Kate still beamed for royal fans as she prepared to set sail

The mother-of-three, who has previously raced against her husband on catamarans, got ready to get in the wate

The mother-of-three, who has previously raced against her husband on catamarans, got ready to get in the wate

Proving she was a true team member, Kate's GBR wetsuit had her name 'Cambridge' written on the back

Proving she was a true team member, Kate’s GBR wetsuit had her name ‘Cambridge’ written on the back

Kate, who proudly donned the GBR cap, chatted with other crew members as she prepared to set sail on a catamaran

Kate, who proudly donned the GBR cap, chatted with other crew members as she prepared to set sail on a catamaran

The Duchess appeared to have no fear as she prepared for the friendly race

The Duchess appeared to have no fear as she prepared for the friendly race

But her brunette locks weren’t down for long as she pulled them back into a ponytail to get ready to race against New Zealand.

Emerging after a quick outfit change, the Duchess was pictured in a grey cap and a GBR wetsuit, ready to join Sir Ben Ainslie and the rest of the Great Britain crew.

Kate joined the team in a race against the skilled New Zealand outfit helmed by Peter Burling in a friendly ‘Commonwealth Race’. 

As she climbed aboard the catamaran to join her new team she was pictured in an orange helmet for safety and also donned a pair of SunGod Great Britain SailGP Limited Edition sunglasses. 

It was most likely light work for the Duchess, who showed her competitive side when she took part in a sailing regatta in The Bahamas at the end of her Royal Caribbean Tour with Prince William in March.

Kate Middleton looked ready for action in nautical stripes and white plimsolls as she prepared to join the Great Britain team

Kate Middleton looked ready for action in nautical stripes and white plimsolls as she prepared to join the Great Britain team

The Duchess had a mischievous smile on her face as she waved at cameras while preparing for her race against New Zealand

The Duchess had a mischievous smile on her face as she waved at cameras while preparing for her race against New Zealand

Game face on! The Duchess looked ready to give the race her all as she walked alongside her captain, Sir Ben Ainslie

Game face on! The Duchess looked ready to give the race her all as she walked alongside her captain, Sir Ben Ainslie

Kate waved at crowds and cameras with a huge smile on her face as she prepared to show her competitive side

Kate waved at crowds and cameras with a huge smile on her face as she prepared to show her competitive side

Kate wore long sleeves for the slightly chillier weather with a sea breeze and had her hair styled in loose curls, hanging over her shoulder on one side

Kate wore long sleeves for the slightly chillier weather with a sea breeze and had her hair styled in loose curls, hanging over her shoulder on one side

Kate will be led by Sir Ben Ainslie in her race as they take on New Zealand in a friendly

Kate will be led by Sir Ben Ainslie in her race as they take on New Zealand in a friendly 

The Duchess talked tactics with Great Britain crew members as she prepared to show her competitive side in a friendly race against New Zealand later today

The Duchess talked tactics with Great Britain crew members as she prepared to show her competitive side in a friendly race against New Zealand later today

Sir Ben's wife, sports presenter Georgie Thompson also donned nautical stripes to watch her husband team up with the Duchess for the race

Sir Ben’s wife, sports presenter Georgie Thompson also donned nautical stripes to watch her husband team up with the Duchess for the race

Posting a video of the race on Instagram, they wrote: ‘Taking to the sea yesterday for a very special regatta here in The Bahamas. Thank you to the crew for braving the rain! It was a close race… ‘

She was all smiles as she prepared for her race and beamed despite the cloudy weather – which could bring about choppy waters.

The SailGP competition, which is being held in Plymouth for the second year running, will see nine international teams take part in short races on high-speed Catamarans.

Sir Ben Ainslie will be leading the Great Britain SailGP team in the short races, in which the catamarans can reach speeds of up to 55 miles per hour. 

Although royal fans saw Kate’s competitive side as she joined the team, her rivals kept in the spirit of the friendly race and gifted her with a gorgeous framed print before she took to the water.

The Duchess of Cambridge is Royal Patron of the 1851 Trust, the official charity of the Great Britain SailGP team. 

The charity works with young people, using sport to inspire an interest in science and technology. 

In recent years the charity has encouraged young people into climate action with its platform, Protect our Future. 

The programme aims to protect oceans and the planet from the effects of climate change by teaching young people about climate science. 

The Duchess was presented with a framed print by the New Zealand SailGP team during her visit to the 1851 Trust, of which she is Royal Patron

The Duchess was presented with a framed print by the New Zealand SailGP team during her visit to the 1851 Trust, of which she is Royal Patron

The Duchess of Cambridge looked pleased with her gift - an intricately painted capital 'A'

The Duchess of Cambridge looked pleased with her gift – an intricately painted capital ‘A’

Kate chatted to her rivals, members of the New Zealand SailGP team, who had presented her with the framed gift

Kate chatted to her rivals, members of the New Zealand SailGP team, who had presented her with the framed gift

Kate spoke with a member of the charity, which uses sport to encourage children to develop an interest in science and technology

Kate spoke with a member of the charity, which uses sport to encourage children to develop an interest in science and technology

During the visit, Kate also joined Protect Our Future programme, learning about seagrass, one of the most important natural tools in countering damaging changes to our climate. 

While planting seagrass and getting to know the children involved with the charity, Kate allowed one young girl to wear her GBR grey hat. 

After an afternoon of fun Kate is likely to be making a swift exit and heading back to London as The Cambridges are expected to be attending the Euro 2022 final, which will see the England Women’s team take on Germany at Wembley Stadium.

FEMAIL earlier reported that Kate and William were considering taking Princess Charlotte, seven, along to the match.

An FA source said the football-mad Princess, who has been honing her goalkeeping skills, may join her parents to cheer on the Lionesses.  

source: dailymail.co.uk