The event from 10am-4pm is centred around the River Exe, and Fore Street and Phoenix Lane in the town centre. Around 70 stalls will be offering a comprehensive range of tempting food and drink.
In addition there will be two DJs, strolling entertainers, face painter and street chalking sessions.
eat:Festivals has partnered with local estate agents Greenslade Taylor Hunt to advertise Sunday’s free event with a series of eye-catching bespoke boards.
Festival Director Sarah Milner Simonds said: "We are really pleased to have agreed a long-term deal with Greenslade Taylor Hunt in four Devonand Somerset towns.
“The team have come up with a creative solution to help us spread the word about the festival. We are thrilled by the quality of the boards and Greenslade Taylor Hunt's enthusiasm for helping us out."
Another festival takes place in Minehead on October 2.