4 mile reef
Why dive here
With 72+ marine species recorded in the area - including blue sharks, dolphins, hammerhead sharks, humpback whales and seahorses - 4 mile reef offers some of Goat Island & Hauraki Gulf's richest reef diving. Water ranges 15-21°C, warmest January, February, March.
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.
Typical 4 mile reef Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Reviews for 4 mile reef
Conditions
Ocean conditions, forecast and tides for 4 mile reef
4 mile reef Ocean Conditions
Monthly averages for 4 mile reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-36.93, 175.86) (22km away)
October Averages
Sea Temperature
16°C
60°F · Range: 14.5–16.9°C
Current Speed
1.41 cm/s
Direction: SE (135°)
Chlorophyll-a
0.497 mg/m³
Moderate productivity
Salinity
34.91 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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