Yes, Witching Hour is definitely a goth band because most of their albums belong to the Gothic Rock and Darkwave genres, which are among the core subgenres of goth music. Albums like Exhumation, Raven, and Hourglass are examples of their goth sound.
One of the other goth artists that is similar to them is Mephisto Walz.
Witching Hour is located in United Kingdom, England, Birmingham, active in 1991 — 2012. You can find more information about Witching Hour on their GothDB band page.