Before You Splash

• Check the marine forecast and tide timing, not just the general weather report.
• Treat offshore days and wreck days as weather-window activities. Keep at least one buffer day.
• Carry an SMB and know how to deploy it.
• In kelp, keep gear streamlined and add a cutting tool.

In the Water

• Expect thermoclines and temperature changes. Do not under-dress for a long dive.
• In surge, stay off the bottom and avoid pushing into caves or tight swim-throughs unless you have stable conditions and solid buoyancy.
• Keep extra situational awareness around boat traffic in harbours and narrow channels.

After the Dive

• Manage cold stress and afterdrop. Warm up gradually, hydrate, and avoid rushing into a cold wind after exiting.
• In remote regions, plan conservatively because medical help can be far away.

New Zealand has modern emergency services, but dive medicine is specialized. For suspected decompression illness, call emergency services and use the Diver Emergency Service (DES) line for coordination and referral. In remote regions like Fiordland and Stewart Island, evacuation and transport can take time, so conservative profiles, hydration, and warm surface intervals matter. If you are doing repetitive or deeper dives, plan rest days and avoid heavy exertion immediately after diving.

Marine Reserves

Marine reserves in New Zealand are strict no-take areas. Do not fish, collect shells, feed fish, or disturb marine life. Use moorings where available and anchor carefully outside sensitive habitats.

Marine Mammals

All marine mammals are protected. Follow approach rules, and in places like the Bay of Islands Marine Mammal Sanctuary do not enter the water if marine mammals are within 300 m of your intended entry point.

Biosecurity

Clean, drain, and dry gear between regions to reduce the spread of invasive species. If local controlled-area restrictions are in place, follow the posted rules and operator guidance.