In 2015 New Bay was ridden in all of his races by the former steeplechase jockey Vincent Cheminaud.
He made his seasonal reappearance, and his debut on turf, in the Prix Machado over 1600 metres at Longchamp Racecourse on 20 April.
He raced in second before taking the lead 200 metres out and won by a length from the favourite Tale of Life.
Over the same course and distance three weeks later he was moved up in class and started a 16/1 outsider for the Group One Poule d'Essai des Poulains.
He was towards the rear for most of the way before finishing strongly to take second place, three lengths behind the winner Make Believe.
On 31 May, New Bay started the 3/1 second favourite in a fourteen-runner field for 178th running of the Prix du Jockey Club over 2100 metres at Chantilly.
Karaktar headed the betting after winning the Prix Noailles whilst the other leading contenders included Silverwave (Prix La Force), Sumbal (Prix Greffulhe), War Dispatch (Prix de Guiche) and Highland Reel (Vintage Stakes).
Cheminaud held the colt up at the rear of the field before beginning to make progress in the straight.
Despite hanging to the right he accelerated into the lead 200 metres out and won by one and a half lengths from Highland Reel with War Dispatch taking third ahead of the outsider Piment Rouge.
Khalid Abdulla's racing manager Teddy Grimthorpe commented The great quality of the horse is his turn of foot.
He was very calm before the race.
He is capable of changing his speed, which characterizes the great horses".

After a two and a half month break, New Bay returned in the Group Two Prix Guillume d'Ornano over 2000 metres on heavy ground at Deauville Racecourse on 15 August.
He started the odds-on favourite against five opponents including the Prix Hocquart winner Ampere and Prix Eugene Adam winner Dariyan.
After racing in second place, he took the lead 400 metres out and won by one and a half lengths from Dariyan.
The colt's next race was the Prix Niel (a major trial race for the Prix de l'Arc de Triomphe) over 2400 metres at Longchamp on 13 September in which he was matched against the Grand Prix de Paris winner Erupt.
He was amongst the leaders from soon after the start, took the lead 200 metres from the finish and won by two and a half lengths from Silverwave with Erupt almost nine lengths further back in fourth.
After the race Fabre expressed his satisfaction saying "He clearly showed he gets the distance and the ground didn't bother him.
It was what he needed and it was a nice, easy race".

On 4 October New Bay started second favourite behind Treve in the Prix de l'Arc de Triomphe.
Cheminaud positioned the colt just behind the leaders on the inside as Shahah set the pace from Golden Horn.
He stayed on strongly in the straight to finish third of the seventeen runners behind Golden Horn and Flintshire.
In 2015 New Bay was ridden in all of his races by the former steeplechase jockey Vincent Cheminaud. He made his seasonal reappearance, and his debut on turf, in the Prix Machado over 1600 metres at Longchamp Racecourse on 20 April. He raced in second before taking the lead 200 metres out and won by a length from the favourite Tale of Life. Over the same course and distance three weeks later he was moved up in class and started a 16/1 outsider for the Group One Poule d'Essai des Poulains. He was towards the rear for most of the way before finishing strongly to take second place, three lengths behind the winner Make Believe. On 31 May, New Bay started the 3/1 second favourite in a fourteen-runner field for 178th running of the Prix du Jockey Club over 2100 metres at Chantilly. Karaktar headed the betting after winning the Prix Noailles whilst the other leading contenders included Silverwave (Prix La Force), Sumbal (Prix Greffulhe), War Dispatch (Prix de Guiche) and Highland Reel (Vintage Stakes). Cheminaud held the colt up at the rear of the field before beginning to make progress in the straight. Despite hanging to the right he accelerated into the lead 200 metres out and won by one and a half lengths from Highland Reel with War Dispatch taking third ahead of the outsider Piment Rouge. Khalid Abdulla's racing manager Teddy Grimthorpe commented The great quality of the horse is his turn of foot. He was very calm before the race. He is capable of changing his speed, which characterizes the great horses".
After a two and a half month break, New Bay returned in the Group Two Prix Guillume d'Ornano over 2000 metres on heavy ground at Deauville Racecourse on 15 August. He started the odds-on favourite against five opponents including the Prix Hocquart winner Ampere and Prix Eugene Adam winner Dariyan. After racing in second place, he took the lead 400 metres out and won by one and a half lengths from Dariyan. The colt's next race was the Prix Niel (a major trial race for the Prix de l'Arc de Triomphe) over 2400 metres at Longchamp on 13 September in which he was matched against the Grand Prix de Paris winner Erupt. He was amongst the leaders from soon after the start, took the lead 200 metres from the finish and won by two and a half lengths from Silverwave with Erupt almost nine lengths further back in fourth. After the race Fabre expressed his satisfaction saying "He clearly showed he gets the distance and the ground didn't bother him. It was what he needed and it was a nice, easy race".
On 4 October New Bay started second favourite behind Treve in the Prix de l'Arc de Triomphe. Cheminaud positioned the colt just behind the leaders on the inside as Shahah set the pace from Golden Horn. He stayed on strongly in the straight to finish third of the seventeen runners behind Golden Horn and Flintshire.
New Bay