Visitors to the square will be treated to apple bobbing, pumpkin carving and face painting.
The Saturday morning farmers' market will be serving up fiendish food including hog roasts, bangers & mash and pumpkin pie from 10am.
At 6.30pm Shortwave Cinema is offering a free open-air screening of of Tim Burton's A Nightmare before Christmas.
Del'Aziz is offering a 2 for 1 deal on Halloween cocktails, Pumpkin soup and pumpkin cookies. They will also run a competition for the most creative fancy dress. Winners will be rewarded with spooky prizes.
Over at Woolfson & Tay there will be face painting and 'The Gruffalo' making a special appearance as well as a 4pm story telling session for children.