But yesterday, as hundreds of pilgrims from Nigeria and England settled in to accommodation across the region, it was clear the much awaited celebrations had well and truly arrived.

Around 1500 pilgrims from 20 countries will call the Illawarra home for the week leading up to World Youth Day activities in Sydney.

The Wollongong Diocese was first to fill up when overseas visitors were asked where they would like to stay leading to the main event.

Yesterday, groups from England swam in the chilly ocean at Bulli like they were in the tropics and 134 Nigerians in colourful outfits checked in to Flinders Motel in Wollongong.

Bishop Peter Ingham, who will host two Nigerian archbishops for the week, had pushed for Wollongong to host a number of large-scale events to help welcome pilgrims to Australia.

Thanks to him there is a big week planned, the focal point being Saturday's Everything Aussie Festival in Lang Park.

On Saturday night, more than 30 international priests will take part in a Mass at WIN Entertainment Centre.

"This is our chance to play an important and rewarding role in Australia hosting the world's largest youth event," Bishop Ingham said.

"While a Catholic initiative, the celebrations are open to all and I encourage everyone to come along to the local events and welcome our visitors."

Father Peter Okonkwo, of Nigeria, said he and the Nigerian pilgrims hoped to "try to get to know the area and enjoy whatever programs there are for us.

"We are happy and looking forward to what's ahead," he said.

Visitors will receive a tourist pack that includes information about the region and discounts for many of the area's attractions.

Tourism Wollongong's Greg Binskin said World Youth Day should result in substantial benefits for the region's tourism and hospitality sectors, as well as retail business.