Kaikōura, New Zealand
    Armers Beach

    Peter’s Rock (Cone Rock)

    Best months: Jun–Oct

    Protected Area

    Armers Beach

    Why dive here

    With 35+ marine species recorded in the area - including humpback whales, seahorses and sperm whales - Peter’s Rock (Cone Rock) offers some of Kaikōura's richest cave diving. Water ranges 10-17°C, warmest January, February, March.

    Best timeJun–Oct
    WetsuitA drysuit
    Marine lifeHumpback Whales, Seahorses and Sperm Whales · 35+ species recorded
    Water10-17°C · warmest January, February, March
    CharacterCave dive
    StandoutDramatic cave topography

    Peter’s Rock, or Cone Rock as some call it, is one of those places we always make time for when we’re in Kaikōura. It’s an easy boat hop from the marina, often with dolphins playing in the wake, which is a nice surface interval show before you even get in. Below, it’s a rugged pinnacle, dropping to around 20 metres, absolutely covered in giant kelp. You’ll feel the gentle sway of those fronds, sometimes a bit of a surge, but it just adds to the wild New Zealand vibe. We love Peter’s Rock for its sheer density of life in a relatively small area. Poke around the kelp forest and the rocky crevices, and you’re almost guaranteed to spot a koura, the local rock lobster, peering out. There are always big schools of spotty and rig milling about, and if you’re lucky, a curious Cape shark might cruise by. Visibility averages about 8 metres, which is decent for the region, and honestly, it makes the kelp feel even more immersive. It’s a great spot for divers who appreciate the subtler beauty of temperate waters and don’t mind a bit of a hunt for marine life.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Cold water this month (avg 12°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today05:4318:4212h 59m daylightGolden hour 18:05

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    Conditions

    Ocean conditions, forecast and tides for Peter’s Rock (Cone Rock)

    Peter’s Rock (Cone Rock) Ocean Conditions

    Monthly averages for Peter’s Rock (Cone Rock), sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-42.41, 173.71) (50km away)

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    October Averages

    Sea Temperature

    12°C

    54°F · Range: 10.8–14.6°C

    Current Speed

    14.42 cm/s

    Direction: SW (213.7°)

    Chlorophyll-a

    0.413 mg/m³

    Moderate productivity

    Salinity

    35.08 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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