At Priory Gardens in Gorleston, children can meet the mischievous Christmas Elves, write a letter to Santa, and post it in a giant post box.
There will be performances by musicians from Ormiston Venture Academy on Friday, November 26; vocal group the TestostaTones and Fay Bedford Stage School on Saturday, November 27; and Great Yarmouth Brass on Sunday, November 28.
Harbour Radio will also be broadcasting from the market across the weekend.
On Sunday visitors can try out a virtual reality experience, and be transported to rollercoaster rides or racing cars, and underwater dives to outer space.
The Gorleston event will culminate on Sunday night with the High Street Christmas lights switch on at 5pm and a spectacular firework display at 6pm.
The Christmas in the Parks event at the Priory Gardens in Gorleston is sponsored by the Greater Yarmouth Tourism & Business Improvement Area BID.
At St George’s Park in Great Yarmouth, the entertainment line-up includes The TestostaTones on Saturday, November 27 and Saturday, December 4; African dance band Pan Afro on Sunday, November 28; guitarist Scott Ribbons on Saturday, December 4; and the Happy Days gospel choir on Sunday, December 5.
Visitors will be able to tour the park on landau horse-drawn carriages.
Running alongside the event there is also entertainment in the Market Place, with a Tunnel of Light for festive selfies and the chance to meet some favourite film characters across the weekend.
On Friday, November 26 you will be able to meet the mystical Snow Queen in her beautiful winter wonderland snow globe as she roams around the Market Place - press the big red button to see her world filled with snow!
The opening evening will also include the Christmas lights switch on at 7pm, by the Mayor of Great Yarmouth, Cllr Adrian Thompson, and Greatest Hits Radio DJ Rob Chandler, followed by a rooftop firework spectacular.
Elsewhere, Great Yarmouth Minster will host its annual Christmas Fayre from Friday, November 26 to Sunday, November 28, with a wide range of stall selling crafts, gifts, and festive treats.
The fayre will be opened by the Mayor at 10am on Friday, November 26, along with carols from St Nicholas Priory School pupils.
A land train will be available to ride between St George’s Park, the Minster, the Market Place, and the seafront Venetian Waterways.
The Waterways is hosting a Santa’s Little Helpers Scavenger Hunt between November 27 and December 19 – pick up a trail card from the Island Café and Boating Lake for a chance to win a £25 voucher.
Entertainment across the events is supported by the Welcome Back Fund.