I spent three weeks driving across New Zealand in early 2026, from the harbour-side bustle of Auckland right down to the fiord-carved silence of Milford Sound. I clocked more than 3,200 kilometres, slept in a campervan parked beside lakes so still they looked like poured glass, and ate my body weight in whitebait fritters. This guide distils everything I learned — routes, timing, costs, mistakes — so your own Aotearoa road trip goes smoother than mine did.
TL;DR: A 10–14 day self-drive loop is the sweet spot for most visitors. The South Island delivers the headline scenery (fiords, glaciers, alpine lakes), while the North Island brings geothermal drama, Maori culture, and two of the country's most famous day trips. Book popular activities and Great Walk permits at least six months ahead for any summer visit. Budget NZD 250–350 per person per day for a comfortable mid-range trip.
Getting Connected Before You Land
Cell coverage in New Zealand's cities is solid, but once you hit the West Coast, the Catlins, or most of Fiordland, signal drops to nothing. Download offline Google Maps for both islands before departure. For data along the way, an eSIM you activate before boarding your flight beats queuing at the airport SIM counter after a 10-hour red-eye.
The WhizComms 14-Day 15GB Unlimited New Zealand eSIM (from S$21.98) gives you instant activation, nationwide coverage on the Spark network (the best for rural areas), and 14 days of high-speed data followed by unlimited slower browsing. I used mine for navigation, translating Maori place names, and uploading far too many sunset photos.
The 14-Day Grand Tour: Auckland to Queenstown
This is the route most first-timers want, and for good reason. It touches both islands, hits the marquee sights, and ends in the adventure capital. Here is a day-by-day framework you can adapt.
| Day | Base | Highlights | Drive |
|---|---|---|---|
| 1 | Auckland | Arrive, pick up rental, Viaduct Harbour | — |
| 2 | Waitomo / Matamata | Hobbiton Movie Set + Waitomo Glowworm Caves | ~2.5 h south |
| 3–4 | Rotorua | Wai-O-Tapu, Polynesian Spa, Maori hangi | ~1.5 h |
| 5 | Tongariro | Tongariro Alpine Crossing (if weather allows) | ~2 h |
| 6 | Wellington | Te Papa, Cable Car, craft beer | ~4 h |
| 7 | Ferry → Picton | Interislander ferry (3.5 h, book early) | — |
| 8 | Kaikoura | Whale watching, crayfish lunch | ~2.5 h |
| 9 | Christchurch | Cardboard Cathedral, Botanic Gardens | ~2.5 h |
| 10 | Mt Cook / Tekapo | Hooker Valley Track, stargazing | ~3.5 h |
| 11 | Wanaka | That Wanaka Tree, Roy's Peak, relaxation | ~2 h |
| 12–13 | Queenstown | Bungy, Milford Sound day trip, wine tour | ~1 h |
| 14 | Queenstown | Fly home | — |
One critical thing the table cannot convey: New Zealand roads are two-lane, winding, and often clinging to hillsides. A stretch that Google says takes two hours will regularly take three once you factor in photo stops, slow campervans ahead of you, and single-lane bridges. Always pad your driving estimates by at least 30 percent.
Day 2: The Hobbiton and Waitomo Double
This is the single most popular day trip in New Zealand, and for good reason. You start the morning walking through the impossibly manicured Shire before descending underground to drift past thousands of glowworms in the Waitomo Caves. The Waitomo Caves and Hobbiton Day Tour from Auckland (from S$160.31) bundles both attractions with luxury coach transfers and a lunch at the Green Dragon Inn — the same pub you watched Bilbo celebrate his birthday in.
A practical note: the tour departs Auckland around 7 AM and returns in the evening, so schedule it for your second day while you are still based in the city. The glowworm caves maintain a constant cool temperature inside regardless of season, so bring a light jacket even in summer.
The South Island: 10-Day Focused Route
If you only have 10 days, spend them all on the South Island. The scenery per kilometre is denser, the crowds outside Queenstown are thinner, and you avoid the time cost of the ferry crossing. Here is the route I would use.
| Day | Destination | Key Experience |
|---|---|---|
| 1 | Christchurch | Arrive, explore rebuild city |
| 2 | Kaikoura | Whale watching by sea or air |
| 3 | Abel Tasman | Sea kayaking, golden beaches |
| 4–5 | West Coast | Franz Josef or Fox Glacier walk |
| 6 | Wanaka | Skydiving, lake stroll |
| 7–8 | Queenstown | Bungy, wine, Milford Sound trip |
| 9 | Te Anau | Glowworm caves, Doubtful Sound |
| 10 | Queenstown | Fly home |
Milford Sound: Choosing How to Experience It
Milford Sound — or Piopiotahi, its Maori name — is the sight that sells New Zealand. Sheer cliffs rising a thousand metres from black water, waterfalls crashing after every rain, and fur seals sunning on rock shelves. But there are several ways to see it, and picking the right one matters.
By Cruise and Kayak
The Cruise and Kayak Milford Sound Tour (from S$223.81) combines a two-hour nature cruise with a one-hour kayak session in Harrison Cove. You also descend into an underwater observatory to see rare black coral. The kayak portion puts you at water level with the cliffs towering overhead — an entirely different perspective from the cruise deck. A picnic lunch is included.
By Morning Cruise with Underwater Observatory
If you prefer a more relaxed pace, the Milford Sound Cruise with Underwater Observatory (from S$65.63) is Milford Sound's longest cruise at two full hours. The morning departure means fewer boats and better wildlife sightings — I spotted three pods of dolphins on an early run. The underwater observatory takes you 10 metres below the surface to see coral and marine life you would never know existed in a fiord.
By Scenic Flight
Weather permitting, the Milford Sound Scenic Flight from Queenstown (from S$287.68) is the most spectacular option. In one hour you see the entire fiord system from above, fly over glaciers the cruise passengers never reach, and save yourself the five-hour return drive from Queenstown. The catch: flights are weather-dependent. Schedule this early in your Queenstown stay so you have backup days.
| Option | Duration | From Price | Best For |
|---|---|---|---|
| Cruise + Kayak | ~4 hours | S$223.81 | Active travellers wanting variety |
| Morning Cruise | ~2 hours | S$65.63 | Relaxed sightseeing, wildlife focus |
| Scenic Flight | ~1 hour | S$287.68 | Photographers, time-poor visitors |
Driving the Road to Milford: What Nobody Tells You
The Milford Road (State Highway 94) from Te Anau to Milford Sound is 120 kilometres of increasingly dramatic scenery, but it demands respect. The road is single-lane in places, passes through the 1.2-kilometre Homer Tunnel (one-way, traffic-light controlled, a 10-minute wait each direction), and is subject to avalanche closures in winter and heavy rain at any time of year. Check the NZTA website the morning of your drive — closures happen without warning.
Budget three hours each way including photo stops. The Mirror Lakes car park (15 minutes from Te Anau) is worth the first stop on a calm morning — the reflection of the Earl Mountains on the lake surface is uncanny. The Chasm, a short 20-minute walk near the tunnel, shows the power of glacial meltwater carving through solid rock. Both are free and well-signposted.
If you are visiting between October and April, start early — by mid-morning the car parks at the Milford Sound terminal fill up and overflow parking adds a 15-minute walk. Campervans and cars share a narrow road, and overtaking opportunities are scarce. Patience is not optional here.
One mistake I made: I filled up with fuel in Queenstown and assumed Te Anau would have a cheap station. It does have fuel, but prices are 15–20 percent higher than Queenstown. Fill up before you leave town. There is no fuel at Milford Sound itself.
Doubtful Sound: The Quieter, Wilder Alternative
Milford Sound gets 99 percent of the attention, but Doubtful Sound — three times longer and ten times the area — is where you go for genuine wilderness solitude. There are no roads in; you reach it by boat across Lake Manapouri and then by coach over the Wilmot Pass.
The Doubtful Sound Overnight Cruise and Coach from Queenstown (from S$231.27) lets you spend a night anchored in a sheltered cove aboard the Fiordland Navigator. After dinner, the crew cuts the engines and everyone goes silent — and you hear absolutely nothing. No traffic, no planes, no hum of civilisation. Just water lapping against the hull and the occasional call of a morepork owl. It was, without exaggeration, the most peaceful night of my life.
Queenstown: The Adrenaline Capital
Queenstown deserves at least two full days. The town invented commercial bungy jumping, pioneered jet boating, and treats skydiving like a normal Tuesday morning activity. But it is also home to outstanding pinot noir vineyards, a Victorian steamship, and some of the best short hikes in the country. Here is what to prioritise.
Kawarau Bridge Bungy
The Kawarau Bridge Bungy (from S$128.88) is where it all started in 1988. The 43-metre leap over the turquoise Kawarau River is the world's original commercial bungy jump. You can opt for a water touch if the river level allows, and tandem jumps are available for couples. Even if you have no intention of jumping, the viewing platform offers stunning river valley scenery.
TSS Earnslaw Cruise
For something gentler, the TSS Earnslaw Cruise (from S$5.00) is a 90-minute voyage aboard a 1912 coal-fired steamship across Lake Wakatipu. You can tour the working engine room and watch the stokers shovelling coal — a surprisingly mesmerising sight. The mountain views from the upper deck are worth the ticket alone.
Queenstown Wine Tour
Central Otago produces some of the world's most celebrated pinot noir, and the Queenstown Half Day Wine Tour (from S$138.70) visits three premium wineries including an underground wine cave carved from solid rock. Tutored tastings, courtesy transport from town, and a return by early evening leave the rest of your day open. A craft beer tasting option is also available for those who prefer hops to grapes.
Ziplining Above Town
The Ziptrek Kereru Tour (from S$86.38) sends you along two ziplines and a 21-metre drop through native forest on the Skyline Gondola hill. It is only an hour long and doubles as a conservation lesson — your guides explain the local ecology and the story of the kereru (native pigeon) as you fly between platforms. A good choice if you want a quick hit of altitude without committing to a full day.
Onsen Hot Pools
After a day of bungy jumping and ziplining, nothing beats the Onsen Hot Pools Queenstown (from S$24.51). These private cedar-lined pools overlook the Shotover River, and after 5 PM lanterns light up around the decks. Each pool fits up to four adults. Book an evening slot and bring a bottle of New Zealand sauvignon blanc — it is the perfect way to close a long day.
Glenorchy and the Lord of the Rings Landscape
The drive from Queenstown to Glenorchy along the shore of Lake Wakatipu is one of the most scenic 45-minute drives in the world. The Glenorchy Half Day Tour (from S$68.97) takes you further in a luxury 4WD, through Lord of the Rings filming locations with GPS-activated commentary, past a sheep shearing demonstration, and into forests that genuinely look like they belong in Middle-earth. The small group size means you can stop wherever the light is best.
Kaikoura: Whales From the Air
Kaikoura sits where deep ocean trenches run close to shore, making it one of the few places on earth where sperm whales are resident year-round. The 30 Minute Kaikoura Whale Watch Seaplane Flight (from S$73.60) takes you 150 metres above the water, where you can see entire whales from head to tail — something impossible from a boat. Dolphins, seals, and occasionally orca complete the picture. Morning flights offer the calmest air and clearest water.
Te Anau Glowworm Caves
If you missed the Waitomo Caves on the North Island, or even if you did not, the Te Anau Glowworm Caves Tour (from S$51.98) is a different and arguably more atmospheric experience. You cross Lake Te Anau by luxury catamaran, then transfer to a small boat that drifts through limestone passages lit by hundreds of native Arachnocampa luminosa glowworms — a species found only in New Zealand. The two-hour-fifteen-minute experience operates year-round.
Adventure Activities: A Quick Comparison
New Zealand has more adventure activities per square kilometre than arguably anywhere else. Here is a snapshot of what is available and what each one involves.
| Activity | Location | From Price | Duration | Adrenaline Level |
|---|---|---|---|---|
| Kawarau Bridge Bungy | Queenstown | S$128.88 | 1–1.5 h | Extreme |
| Wanaka Skydiving | Wanaka | S$391.06 | 2–3 h | Extreme |
| Routeburn Canyoning | Queenstown | S$316.21 | 8–9 h | High |
| Ziptrek Kereru | Queenstown | S$86.38 | 1 h | Moderate |
| Onsen Hot Pools | Queenstown | S$24.51 | 2–3 h | Zero (pure bliss) |
For the full-day immersion, the Full Day Routeburn Canyoning Adventure (from S$316.21) is hard to beat. You get exclusive access to a UNESCO World Heritage canyon with abseils, jumps, ziplines, and slides through pristine native bush. Two guides per group, lunch included, and a scenic drive through Mount Aspiring National Park to get there.
Wanaka: The Quieter Side of the Southern Lakes
If Queenstown is the extrovert of the Southern Lakes, Wanaka is its thoughtful sibling. The lake is just as beautiful, the mountains just as close, but the town itself is smaller, calmer, and harder to leave. The famous Wanaka Tree — a lone willow growing out of the lake — has become one of New Zealand's most photographed subjects, and it genuinely is as striking in person as it looks online, especially at dawn when the mountains behind it catch the first light.
Roy's Peak is the classic Wanaka hike: 1,578 metres above sea level, a relentless 5–6 hour return climb with no shade, but the panorama from the top — where Lake Wanaka and Lake Hawea sit in their valleys with the Southern Alps behind — is one of those views that makes you forget your burning calves. Start before 7 AM in summer to beat the heat and the selfie queues at the famous ridge.
For a different kind of thrill, the Wanaka Skydiving experience (from S$391.06) drops you from 12,000 or 15,000 feet above the lake, with views of Mount Aspiring, the Clutha River, and the patchwork farmland of Central Otago during freefall. The landing zone is right by the lake. It is, by most accounts, the most scenic skydive in the country.
The West Coast Glaciers and the Road to Queenstown
Franz Josef and Fox Glacier are two of the few places on earth where glaciers descend into temperate rainforest. The glaciers themselves have retreated in recent years, so heli-hikes (which land you on the ice) are the best way to get close. If your itinerary has you travelling from the glaciers to Queenstown, the Fox Glacier to Queenstown Tour (from S$75.29) covers the spectacular Haast Pass route in a luxury coach, passing glacier-fed lakes and ancient rainforest.
Rotorua and the Geothermal Heartland
Rotorua sits on the Pacific Ring of Fire's most active geothermal zone, and you will smell it before you see it. The sulphur is pungent — locals call it "Sulphur City" with a mixture of pride and resignation — but what lies beneath the surface is extraordinary. Wai-O-Tapu Thermal Wonderland, about 25 minutes south of town, is the showpiece: the Champagne Pool (a 65-metre hot spring in vivid orange and green), the Artist's Palette (terraces of mineral-stained silica), and the Lady Knox Geyser (erupts daily at 10:15 AM, induced by soap).
Beyond the geothermal drama, Rotorua is the spiritual heart of Maori culture in the North Island. A traditional hangi feast — meat and root vegetables slow-steamed in an earth oven over heated volcanic stones — is the culinary highlight. The food is earthy, smoky, and unlike anything you will eat elsewhere on the trip. Most Maori cultural experiences also include a powhiri (formal welcome), kapa haka (song and dance), and storytelling that connects the landscape to creation myths stretching back hundreds of years.
For families, the Redwoods Treewalk (suspended walkways through 110-year-old Californian redwoods, illuminated at night) and the Skyline Gondola with luge are both excellent. Rotorua is also a mountain biking mecca — the Whakarewarewa Forest trail network rivals anything in British Columbia.
North Island Highlights Beyond Auckland
The North Island tends to get overshadowed by its southern sibling, but it has its own strengths: warmer water, richer Maori cultural experiences, and two of the country's most famous attractions within easy reach of Auckland.
Auckland Itself
Auckland deserves at least a day. The SEA LIFE Kelly Tarlton's (from S$19.65) is uniquely housed in repurposed sewage tanks and features a transparent underwater tunnel, a penguin colony, and native marine species. Families will get two to three solid hours here.
Bay of Islands
Three hours north of Auckland, the Bay of Islands is where New Zealand's modern history began. The Bay of Islands Half Day Guided Tour (from S$58.72) takes you kayaking through the Waitangi Estuary, through mangrove forests to Haruru Falls, all while your guide shares Maori legends about the landscape. Morning tours are best for calm water.
Budget Breakdown: What Does New Zealand Actually Cost?
| Category | Budget (NZD/day) | Mid-Range (NZD/day) | Comfort (NZD/day) |
|---|---|---|---|
| Accommodation | $40–80 (hostels, holiday parks) | $120–200 (motels, Airbnb) | $250–500 (boutique lodges) |
| Food | $30–50 (self-catering) | $60–100 (cafes, pubs) | $120–200 (restaurants) |
| Transport | $40–60 (campervan fuel share) | $70–120 (rental car + fuel) | $150–250 (SUV + flights) |
| Activities | $20–50 (free hikes, one paid) | $80–150 (one major per day) | $200–400 (scenic flights, multi-activity) |
| Total per person | $130–240 | $330–570 | $720–1,350 |
The mid-range bracket — roughly NZD 250–350 for a solo traveller or NZD 180–250 per person for a couple sharing — is the sweet spot for most visitors. It gets you a private room, a rental car, one big activity per day, and a cafe meal in the evening.
When to Go: Seasons Compared
| Season | Months | Weather | Crowds | Best For |
|---|---|---|---|---|
| Summer | Dec–Feb | 20–30 C, longest days | Peak | Beaches, hiking, all activities open |
| Autumn | Mar–May | 12–22 C, stable | Moderate | Wine harvest, golden foliage, photography |
| Winter | Jun–Aug | 2–12 C, snow at altitude | Low | Skiing, hot pools, aurora australis |
| Spring | Sep–Nov | 10–20 C, variable | Low | Waterfalls at peak flow, lambing, wildflowers |
The shoulder seasons — March to May and September to November — are my personal favourites. Prices drop by 20–30 percent, you rarely need to book accommodation more than a day ahead, and the light is extraordinary. Autumn in Central Otago, when the poplars turn gold against a backdrop of snow-capped Remarkables, is one of the most beautiful things I have seen anywhere.
The Tongariro Alpine Crossing
If you are including the North Island in your itinerary, the Tongariro Alpine Crossing deserves a full day. This 19.4-kilometre point-to-point hike through volcanic terrain is widely regarded as one of the best single-day walks in the world, and it lives up to that billing completely. You walk across lava flows, past the vivid emerald and blue crater lakes, up the side of Mount Ngauruhoe (the filming stand-in for Mount Doom in The Lord of the Rings), and through the Red Crater — a landscape that looks more like Mars than New Zealand.
The crossing is a one-way hike, so you need shuttle transport. Several operators run from Whakapapa Village and National Park Village, departing around 6–7 AM and picking up at the Ketetahi end in the afternoon. Book the shuttle the day before — peak summer days fill up. The hike takes most people six to eight hours, and the elevation gain is about 760 metres. It is not technically difficult, but the volcanic terrain is exposed: sun protection, plenty of water (at least two litres), and warm layers for the summit section are essential. Weather changes rapidly at altitude, and DOC (Department of Conservation) occasionally closes the track in extreme conditions — check their alerts page the night before.
The side trip up Mount Ngauruhoe adds about two hours and involves a loose scree scramble that is genuinely strenuous but rewards you with 360-degree views of the volcanic plateau. Be aware that Mount Ngauruhoe is sacred to local Maori iwi (tribes), and while climbing is not prohibited, DOC asks visitors to be respectful and stay on the marked route.
Practical Essentials
Driving
New Zealand drives on the left. An International Driving Permit is recommended alongside your home licence. Roads are generally well-maintained but narrow and winding outside cities. Fill up your fuel tank whenever you see a petrol station in rural areas — the next one can be 100+ kilometres away on the West Coast. Many bridges are single-lane; the diamond sign tells you who has right of way.
Rental car companies require drivers to be at least 21 (some 25 for premium vehicles). Most rentals include unlimited kilometres but charge a one-way fee if you pick up in one city and drop off in another — typically NZD 150–300 between islands. The Interislander ferry accepts rental cars, but confirm with your rental company first as some restrict their vehicles to one island. Campervan rentals are hugely popular for good reason: freedom campsite access, no accommodation costs, and the ability to park right beside lakes and beaches. Wicked Campers and Jucy are the budget options; Wilderness and Britz are the comfortable ones.
Speed limits are 100 km/h on open roads and 50 km/h in towns, but many rural roads have advisory speeds of 35–65 km/h around corners. New Zealand's road toll is proportionally high for a small country — most accidents involve tourists unused to narrow roads, tired drivers on long stretches, or people stopping suddenly for photos. Pull over safely and completely off the road for any stop.
Visa Requirements
Most visitors from visa-waiver countries (including Singapore, Malaysia, the UK, and the US) can enter New Zealand for up to 90 days without a visa, but you do need an NZeTA (New Zealand Electronic Travel Authority), which costs NZD 17 online and should be applied for at least 72 hours before departure. For full details and to check whether your nationality requires a visa, see the New Zealand visa requirements page.
Flight Reservations for Visa Applications
If your visa application requires proof of onward travel but you have not yet purchased your flights, a flight reservation service can provide a confirmed itinerary without the cost of a full ticket.
Booking Strategy
The six-month rule applies to New Zealand more than almost anywhere else. Great Walk permits (Routeburn, Milford, Kepler, Abel Tasman Coast Track) release on a set date and sell out within hours. Milford Sound cruises in peak season fill weeks in advance. Campervan rentals for December and January should be booked by June. For adventure activities like bungy and skydiving, a week ahead is usually fine outside Christmas/New Year.
Maori Culture and Etiquette
New Zealand's indigenous Maori culture is woven into daily life far more deeply than most visitors expect. You will encounter it in place names (Aotearoa means "Land of the Long White Cloud"), in the haka performed before All Blacks rugby matches, and in the carvings on meeting houses throughout the country. A few things to know:
- Greet people with "Kia ora" — it is used universally and warmly received
- If invited to a marae (traditional meeting house), remove your shoes before entering
- The hongi — pressing noses and foreheads together — is a traditional greeting offered on formal occasions. Accept it respectfully if offered
- Many natural landmarks have both English and Maori names. Using the Maori name shows respect
- The concept of kaitiakitanga (guardianship of the environment) is central to Maori culture and explains why New Zealand takes conservation so seriously
What to Pack
New Zealand's weather can change four times in a single afternoon, especially on the South Island's West Coast. Layers are more important than any single warm jacket.
- Rain jacket: Non-negotiable. Fiordland receives up to 8 metres of rain per year
- Sturdy walking shoes: Even non-hikers will walk on uneven terrain at attractions
- Sunscreen and hat: NZ has some of the highest UV levels in the world due to the ozone hole
- Insect repellent: Sandflies in Fiordland and the West Coast are vicious
- Power bank: Rural areas have limited charging opportunities
- Swimwear: Hot pools, beaches, and rivers you will want to jump into
Frequently Asked Questions
How long should I spend in New Zealand?
A minimum of 10 days for one island or 14 days for both. Anything less than a week will feel rushed no matter how you plan it. Three weeks is ideal for a truly relaxed pace.
Is New Zealand expensive?
It is comparable to Australia or Western Europe. A mid-range daily budget of NZD 250–350 per person covers accommodation, a rental car, one activity, and meals. The biggest costs are premium activities (scenic flights, skydiving) and rental vehicles in peak season.
Can I use my foreign driving licence?
Yes, for up to 12 months if it is in English or accompanied by an official translation. An International Driving Permit is recommended as a practical backup.
What is the best time to visit?
Summer (December to February) for the widest range of activities and best weather. Shoulder seasons (March to May, September to November) for fewer crowds and lower prices. Winter (June to August) for skiing and hot pool culture.
Is New Zealand safe?
Extremely safe for travellers. The main risks are environmental — rapid weather changes in the mountains, strong UV, and powerful ocean currents. Follow local safety advice, especially around water and hiking.
How do I get between the North and South Islands?
The Interislander or Bluebridge ferry between Wellington and Picton takes about 3.5 hours and is a spectacular journey through the Marlborough Sounds. You can bring your rental car on board. Alternatively, domestic flights between Auckland and Queenstown or Christchurch take about an hour.
Is New Zealand family-friendly?
Exceptionally so. Most activities have child-friendly options, holiday parks have excellent facilities, and Kiwis are genuinely welcoming to families with children. Attractions like SEA LIFE Kelly Tarlton's, Hobbiton, and the TSS Earnslaw are designed with families in mind.
What local foods should I try?
Whitebait fritters (tiny native fish served in an egg patty), a hangi feast (meat and vegetables slow-cooked underground using heated stones), Bluff oysters (seasonal, May to August), hokey pokey ice cream, and a flat white coffee — which New Zealand claims to have invented, a claim Australia disputes vigorously.
Do I need travel insurance?
Yes. New Zealand's ACC (Accident Compensation Corporation) covers some treatment costs for visitors injured in accidents, but it does not cover illness, trip cancellation, lost luggage, or repatriation. Comprehensive travel insurance is strongly recommended.
What about mobile coverage in remote areas?
Coverage is good in cities and along major highways but drops out in Fiordland, the West Coast, and parts of the Catlins. Download offline maps before you go and consider an eSIM on the Spark network, which has the best rural coverage.