Diving in Goat Island & Hauraki Gulf
Why dive here
Goat Island & Hauraki Gulf offers some of New Zealand's richest diving, with 72+ marine species recorded in the area - including blue sharks, dolphins, hammerhead sharks, humpback whales and seahorses. Water ranges 14-22°C, warmest January, February, March.
Goat Island, New Zealand's first marine reserve, sits just an hour north of Auckland, and we think it's the perfect spot to get acquainted with the country's underwater world. It's a place where you can genuinely see snapper unafraid, swimming right up to your mask. We love the kelp forests, swaying gently with the surge, creating a moody, green cathedral where banded morwong peek out from the fronds and crayfish sometimes just sit out in the open. Beyond Goat Island itself, the Hauraki Gulf offers a surprising variety of dives. You can explore some fascinating shore dives, but our favourite way to experience the Gulf is by boat, jumping in on a pinnacle dive or exploring a sheltered reef wall. Visibility here can swing, it’s fair to say, anywhere from a milky 5 metres to a crisp 15 metres on a good day, particularly after a few days of settled weather. Keep an eye out for Black Stingrays cruising the sandy patches, and if you’re lucky, you might even spot a Common Diving Petrel darting through the water column, hunting. It’s not about huge pelagics here; it's about getting up close with the temperate reef life and appreciating the local characters.
Goat Island & Hauraki Gulf Dive Site Map
Dive sites and dive centres in Goat Island & Hauraki Gulf
Goat Island & Hauraki Gulf Dive Sites
97 dive sites in Goat Island & Hauraki Gulf
4 mile reef
Four Mile Reef, just off Goat Island, offers a simple, rewarding dive. We like the easy shore entry, gently sloping over sand and stone. You'll drop to about 18 metres, often finding good visibility on the sand flats, though the deeper areas can get a bit silty. It’s a great spot for an easy navigation dive, with plenty of koura tucked into crevices. Keep an eye out for schooling snapper and those ever-present rainbow trout. It’s a low-key site, perfect for a relaxed dive when the easterly winds stay under 8 knots.
4 mile reef
Forget the wrecks for a minute. Castaway Island’s house reef, just a two-minute boat ride from the shop, is where we head when we need a reset. It’s a gentle, sandy slope, peaking at 5m, scattered with small coral heads. If you slow down, properly slow down, this place comes alive. We’re talking pipefish: bluestripes, messmates, all tucked into the sand. You’ll spot flounder eyes peeking out, and we’ve found some truly tiny nudibranchs here, often less than a centimetre. It’s a macro heaven, perfect for photographers who like to get low and close. We’ve even seen banded sea kraits hunting through the coral, a sleek ribbon of black and white against the sandy bottom. Visibility averages 13m, which is plenty for this kind of close-up work. It’s our pick for a chill afternoon, a great way to ease back into diving, or just to spend an hour focusing on the small wonders.
Acacia Bay
Catalina Aquarium is a pretty straightforward dive. At a maximum depth of 13 meters, it’s a good spot for a relaxed second dive, or even a snorkel if you’re taking a break from tanks. The reef is home to plenty of the usual Caribbean suspects: we’ve seen nurse sharks resting under ledges, green turtles gliding past, and often find schools of snapper and grunts hanging out. Keep an eye out for the smaller stuff too, like the Blue-spotted Cornetfish or the shy Yellowhead Jawfish peeking from its burrow. While you might not find anything truly exotic here, it’s a reliably pleasant dive with consistently good visibility, often around 20 meters.
Acacia Bay
Acacia Bay, tucked away in the Hauraki Gulf, makes for a straightforward dive, especially if you’re looking to get some practice in. We’ve found it’s a solid spot for honing buoyancy, given the silty patches if you stir things up. The underwater landscape is mostly rock wall, with a circular rock structure that divers built, which is a nice reference point when you’re navigating. Keep an eye out for freshwater crayfish nestled in the cracks, and you might even spot a rainbow or brown trout cruising by. It’s a good choice for newer divers or those simply wanting a relaxed dip to about 15 metres.
Aldermens- Bishops Hat
Bishops Hat, out in the Aldermens, is a fantastic spot we always try to hit when the weather cooperates. It’s exposed to those easterlies and south-easterlies, so pick your day carefully, but when it’s good, it’s *really* good. We love dropping in here, particularly for the cave. It’s not a deep dive, peaking around 17 metres, but the way the light filters in through the entrance is just captivating. Inside the cave itself, we’ve often seen big Rig sheltering, and the walls are plastered with these colourful bristleworms that really catch your eye. Our favourite part has to be the outside wall though, where the kelp gives way to deeper water. This is where you might catch a flash of California Yellowtail or even a cruising Blue Shark if you’re lucky. We always keep an eye out for the cheeky New Zealand Draughtboard Sharks tucked into crevices. Visibility averages around 21 metres, which for New Zealand, feels like a gift. If you’re into a gentle drift, exploring some interesting rock formations, and don’t mind a bit of a boat ride, Bishops Hat is a winner. It’s a great dive for anyone comfortable with a bit of current and keen to see what the Hauraki Gulf really has to offer beyond the usual spots.
Aldermens- Bishops Hat
Cedar Pass, or Paseo del Cedral as some call it, is one of our go-to spots when we want a relaxed dive with a proper payout. It’s shallow, topping out at 19 metres, making it ideal for taking your time, especially if you’re newer to diving or just looking to burn through less air. The real magic here is the landscape – a maze of little coves and crevices, perfect for poking around. We always find something interesting tucked away, whether it's a shy Pallid Goby or a surprisingly chunky Spotted Trunkfish peering out. The visibility is usually superb, around 27 metres, which means the light filtering through the water into those little hideaways is just beautiful. We’ve had some fantastic encounters here, from lazily cruising nurse sharks to the odd spotted eagle ray gliding past. Keep an eye out for the Splendid toadfish, it's a Cozumel exclusive and always a treat to spot their grumpy faces. We love how photogenic Cedar Pass is, with schools of parrotfish and tobacco basslets swirling around the coral. It’s a site that rewards a slow pace and a keen eye.
Aldermens- Fish Factory
Cedral Wall, for us, is one of Cozumel’s truly standout drift dives. We love the way the current often carries you gently along, letting you soak in the view without much effort. You’ll start around 13 metres, then drift over the reef flat before the wall proper drops away. Our favourite part? The sheer density of reef fish here. Look closely, and you’ll spot yellowhead jawfish darting in and out of their sandy burrows, and we’ve often seen big schools of trumpetfish hanging vertically, blending in with the gorgonians. Keep an eye out for green morays tucked into crevices and, if you’re lucky, an eagle ray gliding by in the blue. Visibility is usually excellent, around 28 metres, which really makes the rose coral and smooth flower coral pop. It's a fantastic site for anyone who enjoys a relaxed drift, with plenty of nooks and crannies to explore along the wall down to around 21 metres.
Aldermens- Fish Factory
The Aldermens, and the Fish Factory site in particular, are a bit of a commitment to reach from Goat Island, but we think it’s absolutely worth the boat ride. Once you’re in, it’s a site that keeps your attention. You drop onto a wall that feels like it just keeps going, then a separate pinnacle rises up from the depths, forming a playground of ledges and overhangs. This is a site for divers who appreciate the subtle details and are comfortable with a bit of depth. We love drifting along the wall, keeping an eye out for the New Zealand Draughtboard Sharks tucked into crevices. The currents here can push you along nicely, but they also bring in the bigger stuff – we’ve seen Shortfin Makos here, though you have to be lucky and quick to spot them. Our favourite part is definitely the pinnacle; the pink maomao schooling there are just beautiful, and the way the light filters through them is something special. Keep an eye on your depth here, it’s easy to get distracted and go a bit deeper than planned as you explore.
Aldermens- HoneyComb
Celestes is one of our go-to spots when the current picks up elsewhere. It’s tucked away on the eastern side, and while it might not always have the big pelagic action of some other Cocos sites, it delivers a really enjoyable dive every time. The hard coral here, especially the Starflower and Pavona, forms these sprawling landscapes, and we love drifting over them. Keep an eye out for the Trumpet fish blending in, or the peppered squirrelfish darting into crevices. We’ve had incredible luck spotting the High Hat Triplefin here too, little bursts of colour on the reef. Visibility usually holds at around 35m, which is just glorious. You’ll often find schools of Indian triggers and pyramid butterflyfish shimmering against the blue. It’s a site that rewards a slower pace, letting you really appreciate the smaller things – the Fat-handed snapping shrimp, the Blue Green Chromis flitting about. If you’re into macro life or just want a relaxing, beautiful dive without fighting a ripping current, Celestes is our pick, particularly in the summer months. It’s a genuinely pretty dive, ideal for anyone who enjoys a peaceful drift over healthy reef.
Aldermens- HoneyComb
Aldermen’s Honeycomb isn't just a dive; it’s an exploration. We love how the site immediately draws you in, pulling you through those aptly named honeycomb-like tunnels. Sunlight filters through gaps in the rock, creating these incredible shafts of light, dancing on the walls. It’s an almost theatrical entrance to the deeper reef. Once you emerge, the southern wall drops away, a dark contrast to the brighter caves. This is where we’ve often found kingfish and kahawai cruising in the current – keep an eye out for them, they move fast. The wall itself is dotted with kina, and we’ve spotted some surprisingly large smooth skates settled on the sand at the base, looking almost prehistoric. Visibility here generally holds around 18 metres, which is enough to appreciate the scale of the rock. Our favourite moments are drifting along the wall, feeling that gentle push of the current, watching the larger fish move in and out of view. It's a site that rewards a slow, observant diver, offering a mix of tight, intimate spaces and expansive reef. Just remember to check the currents before you drop in; they can be a bit frisky along that southern stretch.
Aldermens-Middle Middle
We love the Cement Plant for its sheer chaos, in the best possible way. This isn't some pristine, intact wreck sitting pretty. Instead, it’s a sprawling, collapsed pier, a tangle of concrete and rebar that’s become an accidental apartment block for all sorts of critters. At just 10 meters, it's a calm, shallow dive, perfect for just kicking back and letting the world drift by. We’ve spent entire dives here, tracing the outline of the old concrete pilings, now encrusted in sponges and soft corals. It’s the kind of site where you’re guaranteed to find something small and interesting tucked away. Look for puffcheek blennies bobbing their heads in tiny crevices, or a shy octopus trying its best camouflage act amongst the rubble. Our favourite part is the hunt for seahorses. They're here, often clinging to a stray piece of rope or a gorgonian, and spotting one feels like winning a tiny lottery. The schools of small herring and silversides can be immense, often attracting hungry tarpon that cruise through the structure with an easy grace. We’d suggest going early in the morning, before the boat traffic picks up, for the calmest water and the best light filtering through the broken concrete. It’s an easy, rewarding dive, especially if you’ve got a macro lens.
Aldermens-Middle Middle
Middle Middle, tucked into the Alderman Islands, really stands out for us. It’s not about huge pelagics here, though a yellowtail or even a shortfin mako might cruise by if you’re lucky. What we love are those deep, grassy gullies. Drop down and you’re enveloped in a muted green, sunlight filtering through the kelp canopy above. It feels ancient, like a secret garden. Keep an eye out for crayfish tucked into the crevices, their antennae waving. We often spot banded morwong or the tiny, curious triplefins darting through the “grass,” which is actually a type of macroalgae. Visibility averages 14m, sometimes better, offering clear views into the topography. This site is ideal for photographers looking for something a bit different, and anyone who appreciates a tranquil, scenic dive rather than high-octane action. It’s a place to slow down and observe.
Goat Island & Hauraki Gulf Dive Centres
22 dive shops and operators in Goat Island & Hauraki Gulf
Ocean Wildlife in Goat Island & Hauraki Gulf
72 species recorded in Goat Island & Hauraki Gulf
Goat Island & Hauraki Gulf Daylight & Sunrise/Sunset
Sunrise and sunset times for Goat Island & Hauraki Gulf, calculated from coordinates
Today - Monday 24 August
Sunrise
06:51
Sunset
17:50
Daylight
10h 59m
Golden Hour
17:14
First light (dawn) at 06:25 · Last light (dusk) at 18:17
Monthly Averages
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan | 05:14 | 19:40 | 14h 26m |
| Feb | 05:48 | 19:16 | 13h 28m |
| Mar | 06:16 | 18:38 | 12h 23m |
| Apr | 06:43 | 17:53 | 11h 10m |
| May | 07:09 | 17:19 | 10h 10m |
| JunShortest | 07:29 | 17:07 | 9h 38m |
| Jul | 07:29 | 17:18 | 9h 50m |
| AugNow | 07:03 | 17:43 | 10h 40m |
| Sep | 06:19 | 18:08 | 11h 49m |
| Oct | 05:34 | 18:33 | 12h 59m |
| Nov | 05:00 | 19:05 | 14h 5m |
| DecLongest | 04:52 | 19:33 | 14h 41m |
Times are approximate local times based on longitude. Actual times may vary slightly depending on the exact timezone observed in Goat Island & Hauraki Gulf.
Where to Stay near Goat Island & Hauraki Gulf
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Marine Protected Areas near Goat Island & Hauraki Gulf
38 protected areas near Goat Island & Hauraki Gulf - please respect local regulations when diving
Whangarei Harbour Wildlife Refuge
Poor Knights Islands
Te Paepae o Aotea
Tuhua (Mayor Island)
Long Bay-Okura
Whanganui A Hei
Te Matuku
Cape Rodney-Okakari Point
Tawharanui
Motu Manawa-Pollen Island
Whangarei Harbour
Mokohinau Islands
Showing 12 largest of 38
Getting to Goat Island & Hauraki Gulf
Manurewa
Auckland
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