BLACK JACK REEF - Goat Island & Hauraki Gulf

We've always had a soft spot for Black Jack Reef, despite its reputation for being a bit… spiky. Sure, the kina have done a number on some parts of the reef, leaving behind those tell-tale barren patches, but if you look past that, there's still plenty to explore. The maximum depth of 13 meters makes it a relaxed dive, and we often find ourselves lingering, scanning the nooks and crannies. Visibility averages around 4 meters, which means you're really getting up close and personal with the details. This isn't a site for grand vistas; it's a treasure hunt for the smaller stuff. We love spotting the nudibranchs – they're everywhere if you know where to look, a real highlight here. And keep an eye out for New Zealand sole camouflaged on the sandy patches, or a Spotted Stargazer peeking out. The currents can get a bit punchy sometimes, which is exactly why the kahawai hang out here. If you're into macro life and don't mind a bit of a hunt, Black Jack Reef offers a rewarding dive, perfect for photographers or anyone who appreciates the little things.

Location
Goat Island & Hauraki Gulf, New Zealand, Australasia
Coordinates
-36.709800, 175.733300
Type
reef

Marine Protected Area: Rabbit Island

Best Time to Dive in Goat Island & Hauraki Gulf

The warmest water temperatures in Goat Island & Hauraki Gulf occur in February, averaging 22.4°C. The coolest conditions are in August at 14.1°C.

Monthly Water Temperatures

  • January: 21.4°C
  • February: 22.4°C
  • March: 21.8°C
  • April: 19.8°C
  • May: 17.4°C
  • June: 15.3°C
  • July: 14.1°C
  • August: 14.1°C
  • September: 14.7°C
  • October: 16.3°C
  • November: 18.5°C
  • December: 20.3°C

Nearby Dive Sites in Goat Island & Hauraki Gulf

Nearest Dive Centres to BLACK JACK REEF

Marine Life in Goat Island & Hauraki Gulf

Home to 77 recorded species including 43 reef fish, 11 sharks & rays, 3 whales & dolphins, 3 crabs & lobsters, 3 other, 3 sea snails & nudibranchs.

Notable Species

Recommended Packing List for BLACK JACK REEF

Based on average water temperature of 18.0°C, currents 2 cm/s.

  • Wetsuit (3-5mm) - comfortable for 18°C water
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories

Frequently Asked Questions

What is the average depth and maximum depth for dives at Black Jack Reef?
Dives at Black Jack Reef have a maximum depth of 13 meters. While the average depth isn't specifically provided, divers can expect a relatively shallow experience, making it accessible for various skill levels.
What marine life and underwater topography can divers expect to see at Black Jack Reef?
Black Jack Reef is a 2km stretch of reef, though it has been affected by an abundance of kina (sea urchins) leading to a somewhat baron sea floor. Despite this, it remains a good hotspot for plenty of fish, nudibranch, and other macro species. Divers might also encounter kahawai, especially with the presence of strong currents.
Is Black Jack Reef considered a difficult dive, and what skill level is recommended?
Black Jack Reef is considered an intermediate dive. This is primarily due to the presence of some strong currents that divers may encounter. Therefore, it is recommended for divers with a moderate level of experience who are comfortable with current conditions.
When is the best season or time of year to dive Black Jack Reef for optimal conditions?
The provided data does not specify the best season or time of year for optimal diving conditions at Black Jack Reef. For general guidance on planning your dive trips, you can explore our When to Dive section.
Are there any specific diving certifications required or recommended to explore Black Jack Reef?
While no specific advanced certifications are explicitly required for Black Jack Reef, its classification as an intermediate dive suggests that divers should possess at least an Open Water certification and ideally have some experience with drift diving or diving in currents. Comfort with varying current strengths is beneficial for an enjoyable experience.
What are the typical current strengths and visibility conditions at Black Jack Reef?
Divers at Black Jack Reef can expect an average visibility of 4 meters. Additionally, the site is known to have some strong currents, which can make it an exciting spot for species like kahawai but also contributes to its intermediate difficulty rating.