Hammerhead - Poor Knights Islands

Little House on the Prairie is one of our go-to spots on Grand Cayman’s North Side, mainly because it never fails to deliver something interesting. The name comes from a little white house on shore, an old navigational marker for local boaters, and it’s a site that really shines when you take your time. You drop down onto this sprawling, Swiss-cheese kind of reef, all interconnected tunnels and swim-throughs, with massive formations of lobed and mountainous star coral. We love poking into every crevice, looking for those shy emerald sleepers or rosy blennies peeking out. Our favourite thing about Little House is that light plays tricks on you here. One minute you’re in a shadowy swim-through, watching the dust motes dance in the sunbeams filtering through the cracks above, then you pop out onto a brighter patch of reef where sergeant majors flash their stripes. We've seen blackbar soldierfish here, often with their little parasitic isopods attached, and occasionally a curious barracuda cruises by. This site is particularly incredible if you can time your visit for the fall coral spawning, when the star corals are releasing their gametes – a truly wild spectacle. It’s a site that rewards slow diving, perfect for macro enthusiasts and anyone who enjoys exploring a complex reef structure.

Location
Poor Knights Islands, New Zealand, Australasia
Coordinates
-36.174400, 175.071600
Type
reef

Marine Protected Area: Cape Rodney-Okakari Point

Best Time to Dive in Poor Knights Islands

The warmest water temperatures in Poor Knights Islands occur in February, averaging 21.9°C. The coolest conditions are in August at 15.8°C.

Monthly Water Temperatures

  • January: 21.4°C
  • February: 21.9°C
  • March: 21.7°C
  • April: 20.6°C
  • May: 19.1°C
  • June: 17.6°C
  • July: 16.5°C
  • August: 15.8°C
  • September: 15.9°C
  • October: 16.6°C
  • November: 18.2°C
  • December: 19.8°C

Nearby Dive Sites in Poor Knights Islands

Nearest Dive Centres to Hammerhead

Marine Life in Poor Knights Islands

Home to 84 recorded species including 53 reef fish, 11 sharks & rays, 4 whales & dolphins, 4 other, 3 crabs & lobsters, 2 sea urchins.

Notable Species

Recommended Packing List for Hammerhead

Based on average water temperature of 18.8°C, currents 12 cm/s.

  • Wetsuit (3-5mm) - comfortable for 19°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