The Darwin Coast faces the Timor Sea in Australia's Northern Territory, where all diving is done by boat and tidal conditions dictate when and where you can enter the water. The area is defined by the Vernon Islands, a group offering reef systems and blue holes at depths reaching well beyond recreational limits at some spots. Massive tidal movements create strong currents, horizontal waterfalls at low tide, and eddies that restrict diving to slack water during neap tides. Water temperatures are warm year-round, peaking in the wet season and easing slightly in the dry season without becoming cold. Species include whitetip and blacktip reef sharks, green sea turtles, tasselled wobbegongs, whale sharks, bluespotted fantail rays, and pharaoh cuttlefish.
Monthly water temperature across Darwin Coast's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water is warm throughout the year, peaking in the wet season months and at its coolest in the middle of the dry season, though a thin wetsuit or rash vest is typically sufficient. Diving is tide-dependent across all sites, and neap tides are strongly preferred as currents during spring tides can make entry unsafe.
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Water temperature around Darwin Coast ranges from about 26°C in July to 31°C in November, based on satellite sea-temperature data for its dive sites.
In the warm season (about 31°C) a rash guard or 3mm shorty is comfortable in Darwin Coast; in the coldest months (about 26°C) step up to a 3mm full suit.
Fin maps 5 sites in Darwin Coast (4 scuba diving sites and 2 snorkelling spots, with some suited to both).
Across Darwin Coast's dive sites, May, June, July, August, September and October are most often reported as the best months to visit.
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