Footfall fell by 2% in July against the same month last year, but was up 8.1% against a lacklustre June, according to SPSL's Retail Traffic Index.
The footfall figures measure the number of shoppers visiting non-food retail stores.
SPSL's retail psychologist, Dr Tim Denison said: "The decline signals a gradual softening in demand, rather than anything more dramatic; a time when perhaps shoppers are mentally re-adjusting their spending priorities and challenging their old habits; when they are taking stock of their unfamiliar circumstances and being more circumspect looking forwards."
SPSL said that regional shopping centres were still suffering with shopper numbers down 2.4% year-on-year - below the national average. However local high streets were resurgent with some down just 0.9% against the previous year.