Core Risk Factors

Tide and current: Many sites are tide-driven. Plan for slack tide and avoid pushing into current when visibility is low.
Swell and surge: Exposed points can surge even on small swell. Choose entry and exit points with a safe fallback.
Cold stress: Winter water can be near 15°C. Cold increases task loading and gas use. Upgrade exposure protection and shorten dives if you are cooling down.
Boat traffic: Use an SMB for ascents and a dive flag or float for freediving and snorkeling. Surface scan before ascending and avoid channel lines.

Good Habits That Reduce Incidents

Do a weight check early in the trip and adjust for thicker exposure suits.
Carry a cutting tool when diving in kelp or near lines.

Core Risk Factors

Tide and current: Many sites are tide-driven. Plan for slack tide and avoid pushing into current when visibility is low.
Swell and surge: Exposed points can surge even on small swell. Choose entry and exit points with a safe fallback.
Cold stress: Winter water can be near 15°C. Cold increases task loading and gas use. Upgrade exposure protection and shorten dives if you are cooling down.
Boat traffic: Use an SMB for ascents and a dive flag or float for freediving and snorkeling. Surface scan before ascending and avoid channel lines.

Good Habits That Reduce Incidents

Do a weight check early in the trip and adjust for thicker exposure suits.
Carry a cutting tool when diving in kelp or near lines.

Auckland has hyperbaric capability for decompression illness treatment. In any suspected DCI or arterial gas embolism:

Call emergency services immediately and request urgent diving medical support.
Administer oxygen if trained and available, keep the diver warm, and avoid unnecessary exertion.
Contact a diving emergency hotline for medical coordination and referral to a hyperbaric unit.

Sites on points and outer islands can run current and surge even when the surface looks manageable. Time dives around slack tide, keep exits conservative, and do not hesitate to switch to a sheltered backup.

The Hauraki Gulf is active boating water. Use an SMB for ascents, tow a float for freediving and snorkeling, and avoid surfacing in channel lines.

Water near 15°C can increase gas consumption and reduce dexterity. Upgrade exposure protection, keep surface intervals warm and windproof, and shorten the second dive if you are cooling down.

Heavy rain can reduce visibility quickly, especially near urban harbors and river mouths. Bring a light, use a tight buddy formation, and simplify navigation when visibility is below 8 m.

Marine Reserve Rules (no-take Means No-take)

No fishing of any kind inside marine reserves.
Do not take, kill, or damage marine life.
Do not remove or disturb natural materials (rocks, shells, seaweed).
Do not pollute and do not feed fish.
Take care when anchoring to avoid damaging the seabed.

Hauraki Gulf Marine Protection (new Zones)

New marine protected areas are in place in the Hauraki Gulf/Tikapa Moana. Some are marine reserves (no-take), while others are high protection areas (no recreational or commercial fishing) or seafloor protection areas (designed to protect the seabed from destructive fishing methods).
Rules vary by zone. Check official DOC maps, signage at water entry points, and the MarineMate app before boating, anchoring, or entering the water.

Marine Mammals

Keep at least 50 m from whales and 200 m from mother and calf pairs.
Do not swim with whales.
If dolphins approach you, do not chase or cut across their path. Give them space and let them choose the interaction.

Contact	Role	Phone	Availability
Emergency Services	Police, fire, ambulance	111	24/7
Diving Emergency Hotline (New Zealand)	Dive incident coordination and medical referral	0800 4 337 111	24/7 (emergency line)
DAN Emergency Hotline (International)	Diving medical emergencies and advice	+1-919-684-9111	24/7
DOC Hotline	Report marine reserve breaches or marine mammal harassment/injury	0800 362 468	24/7

Auckland + Hauraki Gulf

Safety And Conservation

Top Risks

Dive safety

Core Risk Factors

Good Habits That Reduce Incidents

Safety And Conservation

Top Risks

Dive safety

Core Risk Factors

Good Habits That Reduce Incidents

Snorkel and freedive safety

Wildlife and protected areas

Marine Reserve Rules (no-take Means No-take)

Hauraki Gulf Marine Protection (new Zones)

Marine Mammals

Emergency contacts