Doubtful Sound is a Fiordland fiord reached only by boat, and like other fiords in the region it carries a surface layer of freshwater that blocks light and allows deep-water species to inhabit shallower depths. The three sites in the database cover wall, reef, kelp forest, and drift terrain. The Gut, a high-current channel between Bauza and Secretary Islands, is the most demanding site, with vertical walls dropping to sixty metres and conditions restricted to advanced divers. Nee Islets and Taipari Roa offer more accessible terrain at intermediate level. Water stays cold year-round, and a drysuit is the expected choice.
Monthly water temperature across Doubtful Sound's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Temperatures across Doubtful Sound remain cold throughout the year, sitting at their lowest from mid-winter into early spring. The freshwater layer present at the surface varies with rainfall and can reduce visibility on descent regardless of the season below.
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New Zealand
New Zealand
Water temperature around Doubtful Sound ranges from about 13°C in July to 16°C in February, based on satellite sea-temperature data for its dive sites.
With water around 13–16°C, a 7mm or semi-dry suit works in Doubtful Sound year-round.
Fin maps 3 sites in Doubtful Sound (3 scuba diving sites).
3 more sites to explore
