Akaroa and Banks Peninsula

Scuba and Ascent Planning

DOC warns that Banks Peninsula roads climb to nearly 600 m after diving. Pressure reduction during a road ascent can contribute to decompression sickness. Do not rely on a generic surface-interval figure or treat a no-decompression dive as automatically safe for the hill drive. Use dive-professional advice and individual dive, altitude, repetition and timing details, and consider staying at low elevation if appropriate. High summit hikes, including Otepatotu, are not a safe automatic add-on immediately after scuba.

In-water Safety

Use a knowledgeable dive team, planned entry and exit, adequate thermal protection and a boat/shore watch as appropriate. Reserve access may be isolated or 4WD-only, particularly at Pohatu where DOC reports no cell reception or nearby medical help. Check current water quality at LAWA, marine wind/swell at MetService and water visibility locally. Black Cat dolphin swimmers must be able to swim at least 50 m unaided, tread water and follow spoken English directions; the advertised product does not use life jackets for in-water swimmers. The trip is a guided swim in open sea, not scuba or apnea coaching.

Freediving and Marine Mammals

Never breath-hold dive solo or hyperventilate. Use trained buddy and rescue oversight, with each diver watched continuously at the surface. Animals cannot be chased, touched or fed. Commercial swims are only under appropriate DOC permits; no dolphin swimming with pods containing juveniles. A skipper may decline a swim to protect dolphins or participants.

Emergency Response

For suspected decompression illness or any serious injury, stop diving, call emergency services and the diver emergency line, provide emergency oxygen if available and trained, and follow clinical direction. Do not attempt a self-directed high-altitude evacuation or drive toward a recompression chamber without instructions. Maritime NZ monitors VHF Channel 16 continuously, while Coastguard suggests two waterproof communication methods because mobile and VHF coverage can have gaps.

Akaroa Health Centre provides 24/7 phone triage and urgent care support at 2 Aylmers Valley Road, Akaroa; it explicitly states it is NOT an Emergency Department and arranges transfer for major emergencies. Telephone +64 3 304 7004. Christchurch Hospital's Hyperbaric Medicine Unit provides a 24-hour acute decompression-illness service for the region. Use 111 for immediately threatening conditions and the dedicated Diver Emergency Service 0800 4DES 111 (0800 4337 111) for specialist advice. Transport from an isolated bay can require professional ambulance/helicopter logistics. Visitors should carry medical and evacuation insurance that explicitly covers their chosen activity and any recompression treatment.

Akaroa and Pohatu are no-take DOC marine reserves. No fishing, collecting shells/rocks/seaweed/driftwood, harvesting seafood or disturbing marine life. Keep anchors from damaging seabed habitat and clean hulls and gear to avoid introducing pests. Respect private access at Pohatu and nesting penguins; do not enter unauthorized land or disturb animals. DOC forbids dog access at Pohatu. DOC marine-mammal interaction rules prohibit harassment, touching/feeding and swimming with dolphin groups containing juveniles; boats must idle/no-wake within 300 m and there must be no more than three craft within that zone. The 11 September 2026 DOC announcement extended a ten-year moratorium on new Banks Peninsula commercial marine-mammal permits; existing approved permits were not cancelled. The moratorium is about new concessions, not a ban on all existing guided swim tours. Follow any tighter site/operator permit terms. Pohatu guided penguin trips emphasize viewing from hides and no flash photography. Do not infer that the presence of protected wildlife makes a water activity safe.