Home movies and amateur films have been digitised and will be shown on the big screen, bringing back to life Warrnambool during the 1930s, 40s, 50s and 60s.

The street parade Florado, a national surf carnival, royal visits and the sea baths will feature in the film night which is part of the National Trust Heritage Festival event.

The movies are a mixture of home movies and those made by amateur filmmakers from the Cine Club in the 1960s.

The movie night is expected to run for about two hours and will also feature advertising slides dating back to the 1940s during intervals.

Warrnambool's historical society president Janet McDonald said there would also be some more recent "quirky wild card" films featuring local identities thrown in.

"But you'll have to come and see to find out," she said.

The event kicks off at 7.30pm at Mozart Hall and cost $10, or $5 for members of the history groups.

A Warrnambool City Council grant from the Community Development Fund made digitisation of the films possible.

The three-week heritage festival will also feature a talk at Victoria's first official national park, Tower Hill, on Saturday about one of Australia's most famous architects, Robin Boyd, who designed the visitor centre building.

The event begins at 3pm with a 1.5-hour guided walking tour and marks the centenary of Boyd's birth and celebrates his life, work, and legacy.