The event, organised by the Worthing School Sport Association, will take place on The Gallops, in Findon Valley, between 9 am and 12 pm.
Lesley Hope, chair of the Friends of the Vale School (FOV), said: “This is a great event that shows the talent of the local youngsters and we hope that the community will come along to offer their support.”
Refreshments will be sold on the Gallops or in the school – depending on the weather. Bottles of water, donated by Southern Water, will also be handed out.
Visiting parents are encouraged to “park and stride” to avoid traffic congestion.