Tsunami Preparedness in New Zealand: Emergency Prepping Tips 2026
Tsunami Preparedness in New Zealand: What You Need to Know Before It’s Too Late
New Zealand is surrounded by ocean — and that means tsunami risk is something we all need to take seriously.
From the rugged coastlines of the South Island to the exposed eastern shores of the North Island, every part of Aotearoa’s coastline is vulnerable. And unlike many disasters, a tsunami can arrive within minutes — leaving little time to react.
The key to survival isn’t luck. It’s preparation.
Why Tsunami Risk is Real in New Zealand
New Zealand sits on the boundary of the Pacific and Australian tectonic plates — one of the most active seismic regions in the world.
Tsunami can be triggered by:
- Offshore earthquakes
- Underwater landslides
- Volcanic activity
- Distant events across the Pacific
In some cases, you may have hours of warning. In others, especially local tsunami, you may only have minutes — or none at all. Learn more about tsunami in NZ
The Rule That Saves Lives: “Long or Strong, Get Gone”
If you remember nothing else, remember this:
Long or Strong, Get Gone.
If an earthquake:
- Makes it hard to stand, OR
- Lasts longer than a minute
Do not wait for alerts. Move immediately to higher ground or inland.
Natural warning signs can also include:
- Sudden rise or fall in sea level
- Loud or unusual ocean noises
If you notice any of these — act immediately.
Before a Tsunami: Preparation is Everything
Preparedness starts well before any emergency.
1. Know Your Evacuation Zone
Every coastal area in New Zealand has mapped tsunami evacuation zones. You should know:
- If your home, workplace, or school is in a zone
- The fastest route to safety
- Where “high ground” is in your area
If you are concerned or want to know more about the address you live in and what potential risk there is from Tsunami, then click on the following link, where you can input your address, and find out of you are at risk, and if so, where your evacuation zone is. Check your local tsunami evacuation zone
2. Plan Your Escape
Create a simple, realistic plan with your household:
- Where will you go?
- How will you get there?
- What if you’re separated?
Practising your evacuation route (a “tsunami hīkoi”) builds muscle memory for when it matters most.
How to Practise Your Tsunami Hīkoi
A tsunami hīkoi is a practice evacuation walk — knowing your route and where to go can save precious minutes in an emergency.
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Check your location
Find out if your home, workplace, school, or community meeting place is in a tsunami evacuation zone. Your local Civil Defence Emergency Management Group provides maps and advice for every area. -
Plan your route
Map a safe path out of the zone. Walking or cycling is often fastest, especially if roads are blocked. Make sure everyone in your household knows the route. -
Decide where you’ll go
Your evacuation destination may be with friends, family, or a designated high-ground location. Ensure your contacts know your plans in case you’re separated. -
Practise together
Walk your tsunami hīkoi with your family, colleagues, or classmates. Practising builds confidence and muscle memory so you can act quickly if a real tsunami strikes. -
Join community events
Take part in Tsunami Hīkoi Week or ShakeOut events — these drills are designed to make practising safe, fun, and effective.
3. Build a 72-Hour Emergency Kit
You may not be able to return home for days. A ready kit can save precious time:
- Water and food
- First aid supplies
- Torch and batteries
- Portable radio
- Personal medications
- Essential documents
We have ready-to-go 72-hour kits that make preparedness simple. You can also supplement with:
During a Tsunami: Seconds Matter
If you’re near the coast and feel an earthquake:
- Drop, Cover, Hold during shaking
- As soon as it stops — move immediately
- Go as high or as far inland as possible
- Do not wait for official warnings
Avoid:
- Driving if possible (traffic can trap you)
- Returning home for belongings
- Delaying for pets if it slows you down
Even a small delay can be the difference between safety and danger. Recent overseas history has shown us just how quick, and how devestating Tsunamis can be, and recent issues Tsunami Alarm testing has also show us just how unreliable technology can be also. Tsunami waves can move at increidbly fast speeds, and depending on how the tsunami is created, and how far off shore the triggering event happens, the time it takes for the Tsunami wave to hit the shore differs majorly. As such, it can be stressed enough, if it is a long earthquake or a strong earthquake, you need to get gone. Don't wait on an official notification, it may not come, and if it does, it may not come in time. It is far better to take action and nothing happen, than take no action and be caught in the middle of a Tsunami Event.
Understanding Tsunami Warnings in NZ
There are three types of warnings:
Natural Warnings (Most Important)
Your first and fastest alert:
- Earthquake shaking
- Strange ocean behaviour
Always act immediately.
Official Warnings
Issued by Civil Defence via:
- Emergency Mobile Alerts
- Radio and TV
- Sirens and local systems
Unofficial Warnings
Social media, friends, or news reports.
If credible, treat them seriously — but prioritise official guidance when available.
After a Tsunami: Don’t Rush Back
The danger isn’t over after the first wave.
- Stay away from the coast for at least 24 hours
- Multiple waves can occur
- Strong currents remain dangerous
Only return when authorities give the all-clear.
A Final Word: Preparedness Saves Lives
Tsunami are unpredictable — but your response doesn’t have to be.
The reality in New Zealand is simple:
- You may not get a warning
- You may only have minutes
- Your actions in those moments matter
Having a plan, knowing your route, and keeping essential gear ready could save your life — and the lives of those around you.
Be Ready Before It Happens
At Next72Hours, our focus is simple: helping Kiwis be ready for the first 72 hours of any emergency.
Because when the ground shakes and the ocean moves — you won’t have time to prepare.