Stafford-built locomotive, Wendy, will operate on The Hayling Seaside Railway next weekend.
She will run between Beachlands and Eastoke Corner – where the railway will open its new depot.
Owner of The Hayling Seaside Railway, Bob Haddock, is looking forward to welcoming Wendy on to the line.
He said: ‘It will be absolutely fantastic. She was built 98 years ago so she has a lot of history behind her.
‘It’s great that we get the opportunity to enjoy operating a steam train.’
Mayor of Havant Elaine Shimbart will officially open the railway’s new depot on Saturday, with a host of activities taking place across two days.
Vintage tractors and motorbikes are set to park up at the Eastoke Corner site, where visitors can expect a tombola and stalls raising money for local charity.
Mr Haddock said the relocation of The Hayling Seaside Railway’s depot was a welcome one.
‘We needed a larger and more modern building and that’s exactly what we have now.’
Across the weekend, Wendy will be making frequent journeys along the seafront – with her first departure from Eastoke corner scheduled for 10am on Saturday.
She will be pulling four carriages and 90 passengers and is sure to be a hit with youngsters, says Bob.
‘It’s wonderful watching children who have never seen a steam train before, they’re awe-inspiring machines up close.
‘I’d like to say thank you to all the people along the seafront who wave back to the children on the train.
‘They actually play a game on board called sweet and sour.
‘If you wave back, you’re sweet – and if you don’t... You can probably guess the rest!’
The Hayling Seaside Railway has been operated from Beachlands by volunteers for the past 13 years.
A family return ticket for the journey is £9.
Celebrations for the opening of the Eastoke Corner depot will run from 10am until 4.30pm on Saturday and Sunday, August 5 and 6.