Water temperature data from over 30,000 sites across England and Wales collected by the Environment Agency for different reasons. The archive contains water temperature data (up to 2007) and site metadata. Most sites have records starting from the 1980s. The water temperature data are available in two main types; spot samples from routine monitoring (e.g. monthly) and high resolution samples (e.g. every 15 minutes). The archive contains water temperature data as well as site metadata.