On 22 March 1991, with Luton still in the First Division and Dowie still a first team regular with seven goals from 29 games that season, Dowie agreed to join Second Division promotion chasers West Ham United for a fee of £480,000. He proved himself to be a competent deputy for the injured Trevor Morley as his four goals in the final 12 league games of the season secured the team's promotion as Second Division runners-up. But when the 1991–92 season began, Morley had returned to fitness and Dowie found himself on the sidelines until his £500,000 move to Southampton on 3 September 1991 after less than six months at Upton Park.