New Zealand-born producer Roger Mirams followed his earlier children's television programs The Terrific Adventures of the Terrible Ten and The Magic Boomerang with this ship-based adventure series, which, as Don Storey points out in his Classic Australian Television, was one of 'three Australian half-hour adventure series [that] were set on boats' during the first twenty years of Australian television.
Adventures of the Seaspray followed the adventurers of a widowed journalist who is raising his three children on a schooner in the South Pacific (aided by a Fijian crew member, Willyum).
According to Moran, in his Guide to Australian TV Series, 'The 26 half-hour stories have all the adventure material that children love - haunted islands, rescues, shipwrecked sailors, hidden treasure, smugglers and primitive tribes all filmed in exotic Pacific locations.'
Storey concurs with this analysis, and adds
Seaspray was notable for several achievements, apart from a high standard of production. It was filmed on location in an international setting; it was the first Australian television show to be filmed in colour since the 1955 series The Adventures of Long John Silver (made before Australia had television); it was the first co-production with an overseas company; and it had a Fijian native in a lead role, the first Australian series to give such prominence to a non-white person.