Seal Rock / Waikaranga - Goat Island & Hauraki Gulf

The Gut feels like a secret passage. You ease into this narrow channel, often having to time your entry just right if there’s any swell. We love how the light plays on the colourful wall to your right as you move deeper, past the initial shallow rocks. It’s only about 7m here, but the rock formations are impressive, covered in sponges and anemones. Our pick for a perfect drift on a calm day. It’s an intimate dive, not about grand vistas but about the smaller, often overlooked creatures. Look for the Big-belly seahorse clinging to kelp fronds, or the flash of a Southern reef squid. You’ll often spot juvenile crayfish tucked into crevices. The Gut opens up onto a sandy area at about 5m, scattered with smaller reef sections – a good spot to scan for Southern Eagle Rays gliding past. Visibility averages around 7m, which is decent for a channel dive, making it feel even more like a hidden world. This dive suits macro enthusiasts and anyone looking for a relaxed, sheltered exploration, especially when the main outer sites are too exposed.

Location
Goat Island & Hauraki Gulf, New Zealand, Australasia
Coordinates
-39.055800, 174.003500
Type
reef

Marine Protected Area: Sugar Loaf 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 Seal Rock / Waikaranga

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 Seal Rock / Waikaranga

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