Seabreeze (1885– 22 April 1909) was a British Thoroughbred racehorse. She won several races as a two-year-old including the Ascot Biennial Stakes, but was overshadowed by Friar's Balsam. As a three-year-old she was even better. After finishing as the runner-up in the 1000 Guineas, she won the Oaks Stakes, Coronation Stakes, Lancashire Plate, St. Leger Stakes and Newmarket Oaks. Seabreeze stayed in training as a four-year-old, when she ran in top-class races, but didn't win. She was owned by Frederick Henry William Gough-Calthorpe, 5th Baron Calthorpe, and trained by James Jewitt. As a broodmare she produced some high class runners, but none matched the success of their dam.

Seabreeze was a chestnut filly bred by the Duchess of Montrose and foaled in 1885. She was sired by Isonomy, who won the Ascot Gold Cup twice and the Goodwood and Doncaster Cup. He also became a successful stallion, siring the two Triple Crown winners Common and Isinglass, along with the successful stallion Gallinule. Seabreeze's dam was St Marguerite, a daughter of Hermit. St Marguerite won the 1000 Guineas and was runner-up in the Oaks. St Marguerite also had success as a broodmare, also foaling Roquebrune, the dam of Triple Crown winner Rock Sand. The Duchess of Montrose sold Seabreeze to Captain Machell, who then sold her on to Frederick Henry William Gough-Calthorpe, 5th Baron Calthorpe. The filly was put into training with James Jewitt.

Seabreeze made her racecourse début on 15 April 1887 at the Newmarket Craven meeting in the Fitzwilliam Plate. Seabreeze started as the 2/1 favourite and raced down the centre of the track. With three furlongs left to run she was just behind the leader Anarch. Anarch then lost ground, but came back in the closing stages to win by a neck from Baron Rothschild's Robert the Devil filly. Seabreeze was a further three quarters of a length back in third place.

On 8 June at Royal Ascot Seabreeze started as a 5/1 shot for the Biennial Stakes over five and half furlong two-year-old course. Seabreeze led the field from the start and despite being challenged by Dieman's Land in the final two furlongs, she extended her lead and won by five lengths. Beaufort's Hark was second and Anarch third. Two days later she stepped up in class for the New Stakes, where, conceding weight to all the other runners, she started as the 100/30 joint-second-favourite with Ayrshire; Friar's Balsam starting as the 13/8 favourite. After a couple of false starts, Friar's Balsam, racing down the centre of the track, led the field. Bartizan and Seabreeze were also near the front, but were racing down the right-hand side of the course. At the half-way point of the five and a half furlong race, Bartizan faded away, promoting Seabreeze to second and Ayrshire to third place. Ayrshire also faded before the finish, which was fought out between Friar's Balsam and Seabreeze. In the end, Friar's Balsam pulled away to win by three lengths. Seabreeze was second, well clear of third-placed Ayrshire.

At Newmarket she finished second, three quarters of a length behind odds-on favourite Friar's Balsam, in the July Stakes. At Goodwood she was a very strong favourite for the Ham Stakes. After stalking leader Lunan until the four runners had a furlong to run, she made her challenge and won easily by a length from Lunan. On 27 September, at the odds of 1/10, she easily won the Buckenham Stakes by three lengths from her only rival Nina. In the very next race, Seabreeze was made odds-on favourite for the Boscawen Stakes. In the final 100 yards of the race, Seabreeze challenged leader Disappointment and beat her by a neck, with the pair being four lengths clear of third placed Love in Idleness. In the Middle Park Plate, Seabreeze again faced Friar's Balsam, who started as the 4/9 favourite. Friar's Balsam again made the running. He was never caught and beat Hazlehatch by a length and a half. Seabreeze was a further two lengths back in third.

At Newmarket on 4 May 1888, Seabreeze started as the 6/4 favourite for the 1000 Guineas Stakes. She was ridden near to front of the field throughout the race by jockey William Robinson, but with about three furlongs to run Briar-root had a big lead over Belle Mahone, with the latter being clear of the rest of the field. At they went down the hill, Seabreeze faded as the front two pulled away. After being six lengths behind Belle Mahone, Seabreeze rallied and overtook Belle Mahone, but could not catch the leader. Briar-root won the race by two lengths from Seabreeze, who was a length ahead of third placed Belle Mahone.

One month later she faced Briar-root again in the Oaks Stakes at Epsom Downs. Only six fillies started the race, with Briar-root starting as the 5/4 favourite. Seabreeze was priced at 7/4 and Polydor at 10/1, with the other three being 100/8 or bigger. Rada made the running in the early stages and was followed by Briar-root, with Seabreeze in second to last place. Briar-root took the lead after 200 yards, by which time Seabreeze was at the rear of the field. By the time they had run half a mile Seabreeze had made up two places. Before the field reached Tattenham corner Briar-root pulled away from the others and Seabreeze took second. Briar-root was still in front as they raced down the finishing straight, but began to fade with 300 yards left to run, when Seabreeze and Belle Mahone came to the front. Seabreeze held Belle Mahone relatively easily to win by two lengths from Rada, who overtook Belle Mahone in the final 50 yards. Belle Mahone was one length behind Rada in third place. Her Majesty was fourth, Briar-root fifth and Polydor last. The time of 2 minutes and 42.8 seconds was the fastest time the race had ever been run in.

At Royal Ascot Seabreeze started as the odds-on favourite for the one-mile Rous Memorial Stakes. Seabreeze took the lead in the second half of race, but was caught and passed by the four-year-old colt Phil in the final 100 yards. Phil beat her by half a length, with Renown four lengths behind Seabreeze in third place. Two days later she took part in the Coronation Stakes, a one-mile race for three-year-old fillies, for which she was made the odds-on favourite. After the start Fleur de Marie went in the lead and was clear of the chasing pack. As they turned into the finishing straight Love in Idleness took the lead and was followed by Estafette, with Seabreeze closing in on them. Seabreeze shot into the lead in the closing stages of the race and won easily by two lengths from Estafette, who was a neck ahead of Love in Idleness.