Opening times are from 10am to 4.30pm on Monday to Saturday until December 18.
Local MP Greg Clark will officially start the festive campaign on October 26.
Cards For Good Causes is a not-for-profit organisation, so chosen charities will receive a minimum of 70p out of every £1.
The shop is staffed by volunteers, and shop manager Karen Bryant said: “Buying charity Christmas cards is one of the simplest ways to support good causes this festive season.
“We have over 300 temporary shops nationwide, so there is sure to be one near you. Alternatively, you can order them from our online shop at cardsforcharity.co.uk
“We are always on the lookout for new volunteers, so if you get a couple of hours spare and would like to get involved we’d love to hear from you. Please get in touch via our website.”
