Port Douglas and Agincourt spans outer ribbon reefs, sheltered inner reefs, and a handful of nearshore sites, giving divers and snorkellers a broad range of experiences. Agincourt Reef anchors the offering with its walls, pinnacles, and drift dives, while Low Isles and Tongue Reef provide calmer alternatives. Signature encounters include Napoleon Wrasse, Grey Reef Shark, Whitetip Reef Shark, and the occasional Ornate Ghostpipefish. The majority of sites are beginner-friendly and accessed by boat.
Monthly water temperature across Port Douglas & Agincourt's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water is warmest from December through March, easing to its coolest between June and September when conditions are generally calmer and visibility tends to be at its best. The dry season months from May through October attract the most divers, with reduced wind chop making boat trips to the outer reefs more comfortable. Agincourt's exposed walls and passes can carry moderate currents, particularly at intermediate sites such as Anybody's and Barracuda Pass.
17 operators
19 more sites to explore
7 areas
15Outer ribbon reef diving with walls, pinnacles and consistent Napoleon Wrasse sightings.
4Tropical reef and wall diving from Port Douglas, with sites ranging from beginner coral gardens to a deep wall at forty metres and reef sharks recorded.
4Accessible tropical reef diving and snorkelling near Port Douglas, spanning seagrass shallows to walls, with turtles, reef sharks, and rich invertebrate life.
3Outer Great Barrier Reef site off Port Douglas, with coral gardens from shallow heads to thirty metres and species including turtles and reef sharks.
2Outer Coral Sea reef off Port Douglas with walls, drift, and drop-offs, and a species list led by bumphead parrotfish and reef sharks.
1Boat-access reef diving off Far North Queensland, with a shallow fringe reef and access to the Agincourt Ribbon Reefs.
A crescent-shaped Great Barrier Reef system off Port Douglas with walls, drop-offs, and calm conditions suited to beginners.
Water temperature around Port Douglas & Agincourt ranges from about 25°C in June to 29°C in February, based on satellite sea-temperature data for its dive sites.
In the warm season (about 29°C) a rash guard or 3mm shorty is comfortable in Port Douglas & Agincourt; in the coldest months (about 25°C) step up to a 3mm full suit.
Fin maps 31 sites in Port Douglas & Agincourt (29 scuba diving sites and 12 snorkelling spots, with some suited to both), organised into 7 areas.
The region has a well-documented list of observed species. Napoleon Wrasse and Harlequin Sweetlips are common across many sites, while Grey Reef Shark and Whitetip Reef Shark are regularly encountered on the outer ribbon reefs. Ornate Ghostpipefish appear occasionally, and Green Sea Turtle has been recorded at several sites. Titan Triggerfish, Regal Angelfish, and Pacific Sailfin Tang round out a diverse reef fish community.
The majority of sites in this region are rated beginner level, including Turtle Bommie, Opal Reef, Escape Reef, and the shallow tops of Agincourt Ribbon Reefs. Intermediate divers have dedicated options in deeper, current-prone sites such as Anybody's, Barracuda Pass, and China Wall. There are no shore-entry dive sites listed; all diving is by boat.
Agincourt Reef sits on the outer ribbon reef edge and offers the greatest variety of site types, from shallow snorkel-friendly tops to deep walls and drift dives. Tongue Reef includes both calm beginner bommies and the deep China Wall drop-off. Low Isles provides the most sheltered conditions and is well suited to snorkellers and less experienced divers. Mackay Reef and St Crispin Reef offer additional reef diving with a smaller number of sites each.
A range of operators is based in the area, including Wavelength Reef Cruises, Poseidon Outer Reef Cruises, Calypso Reef Cruises, Ocean Safari, and Blue Dive Port Douglas, among others. Scuba Iq, Aquapro Dive Services, and Abc Scuba Diving Port Douglas also offer diving services. With many operators available, there are options catering to snorkel-only day trips as well as guided dive packages.
