There's no surfing in this clip but it shows Bali during the 30s.
Indonesia was first surfed in the late 1930s by an American from Los Angeles named Robert Koke. The story goes that he first learned to surf in Hawaii while working as a location still photographer for Hollywood’s Metro Golden Mayer.
His first visit to the island of Bali was with his wife Louise in 1936. The couple feel in love with the place and returned, settled there and built a hotel in the Kuta Beach area. The hotel was aptly named The Kuta Beach Hotel.
Koke’s surfing eye was drawn to Kuta’s consistent waves and their surfing potential. He arranged for two Waikiki style redwood surfboards to be shipped to Bali from Hawaii. During the end of 1938 he paddled out into the waves at Kuta and became the first person to surf in Indonesia.
Apparently he mainly surfed up and down Kuta Beach; Kuta Reef and explored remote spots west of Kuta.
Unfortunately, the Kuta Beach Hotel closed in 1941, just before the invasion of the Japanese during the Second World War. The thunder of war would end surfing in Indonesia until the late 1960s.