"Under the Weather" is an alternative rock song performed by British singer-songwriter KT Tunstall. The song was written by Tunstall and TommyD and produced by Steve Osborne for Tunstall's debut album Eye to the Telescope (2004). It was released as the album's fourth single on 5 December 2005. The song reached #39 on the UK Singles Chart, remaining on the chart for two weeks.