MetService, formally the Meteorological Service of New Zealand Limited, is New Zealand's national weather service. It operates as a state-owned enterprise, headquartered in Wellington, with a history of official meteorology in New Zealand stretching back to the nineteenth century. Today it serves two broad roles: providing public weather information as the country's official forecaster, and delivering specialised meteorological services to commercial clients at home and overseas.
Its status as the official source matters. When MetService issues a severe weather warning, that information feeds directly into the decisions made by Civil Defence and Emergency Management groups, transport agencies, and local councils. News outlets across the country also republish MetService forecasts, which is why its terminology — watches, warnings, severe weather outlooks — appears everywhere from radio bulletins to newspaper front pages.
What MetService Provides
MetService covers a wide range of forecasting needs, all accessible through its website, metservice.com, and its mobile app.
Urban forecasts. Detailed forecasts for cities and towns across New Zealand, typically extending ten days ahead. Each forecast includes expected temperatures, rainfall, wind, and a day-by-day narrative describing how conditions will develop.
Rain radar. Live radar imagery shows where rain is falling right now and how rain bands are moving. This is one of the most-used tools for short-term planning — checking whether a shower will pass before an afternoon walk, or tracking a rain band approaching your area over the next couple of hours.
Severe weather information. Outlooks, watches, and warnings for heavy rain, strong winds, snow to low levels, and severe thunderstorms, displayed on maps and explained in plain language bulletins.
Marine forecasts. Recreational marine forecasts for inshore waters, coastal forecasts covering waters around the New Zealand coastline, and high seas information. These include wind, sea state, and swell details that boaters, fishers, surfers, and coastal walkers rely on.
Rural forecasts. Conditions relevant to the agricultural sector, including rainfall, wind, temperature trends, and fire weather information used in fire danger assessment.
Mountain and national park forecasts. Weather for alpine areas and popular hiking regions, where conditions can differ dramatically from nearby towns. These forecasts cover expected temperatures, wind chill, precipitation, and snow levels where relevant.
Aviation meteorology. MetService supplies the official weather information used by aviation in New Zealand airspace, from airline operations to flight briefing services.
Understanding Watches and Warnings
One of the most valuable things any New Zealander can learn is how MetService's severe weather system works, because the difference between an outlook, a watch, and a warning signals how urgently you need to act.
Severe Weather Outlook. Issued when forecasters see the potential for severe weather several days ahead, but uncertainty is still high. It's a heads-up to stay informed as the situation becomes clearer.
Severe Weather Watch. Issued when severe weather is possible or likely within the next couple of days but forecast details — timing, location, or intensity — are still uncertain. A watch means you should monitor updates and think about how the weather could affect your plans.
Severe Weather Warning. Issued when severe weather is expected or already occurring and confidence in the forecast is high. Warnings specify the expected rainfall amounts, wind speeds, or snow levels, the areas affected, and the time period. This is the stage where practical preparation matters: securing outdoor items, adjusting travel plans, and checking on Civil Defence advice.
MetService's severe weather maps use colour to convey severity at a glance, with red reserved for the most extreme events — the kind that pose a genuine threat to life and property and often trigger Civil Defence responses. Orange indicates warnings for significant severe weather, while yellow is used for lower-impact warnings and watches. The thresholds that trigger a warning vary by region, because a rainfall amount that is routine in Fiordland would be exceptional in Central Otago or Northland.
Severe thunderstorm warnings deserve special mention. These are short-fuse warnings issued when a thunderstorm capable of producing damaging wind gusts, large hail, or tornadoes is detected or imminent. They can arrive with little notice, which is why people in thunderstorm-prone conditions are advised to keep an eye on updates during the event itself.
Using the Website and App Effectively
The metservice.com homepage gives a national overview, but the site rewards a little exploration.
For everyday planning, start with your local urban forecast. The day-by-day breakdown is written by meteorologists and often explains the why behind the weather — an approaching front, a lingering ridge of high pressure, a change in wind direction. Reading the narrative alongside the icons gives a far better picture than icons alone.
For the next few hours, rain radar is the tool of choice. The looping radar imagery lets you judge whether that patch of green and yellow on the screen will pass over you, stall, or miss your area entirely. It is particularly useful in changeable spring and autumn conditions when showers come and go quickly.
Before heading into the hills or onto the water, always check the specialised forecasts rather than the nearest town's forecast. Mountain areas can be dramatically colder and windier than the valley below, and conditions in coastal waters can differ sharply from conditions on shore. The recreational marine and mountain forecasts exist precisely for this reason.
During settled weather, the ten-day forecast is handy for planning ahead, but treat the far end of the range as indicative rather than firm. Forecast confidence naturally decreases with time, and MetService's own forecasters generally advise placing the most weight on the first three to five days.
MetService and Civil Defence
During major weather events, MetService works alongside the National Emergency Management Agency and local Civil Defence groups. MetService provides the meteorological expertise — the forecasts and warnings — while Civil Defence authorities make decisions about road closures, evacuations, and states of emergency.
For the public, this division of labour means two things. First, MetService tells you what the weather will do; your local Civil Defence tells you what you should do about it. Second, if a warning is issued for your area, it's worth checking both MetService and your local Civil Defence or council channels, especially for events like flooding or storm surge where local impacts depend on tides, drainage, and geography.
Beyond the Public Forecast
Less visible to the general public is MetService's commercial and international work. It provides tailored forecasting for industries such as energy, aviation, and agriculture, and supplies meteorological services to other national weather services around the world. Revenue from these commercial operations supports its public role, which is funded in part by the government to ensure New Zealanders have access to official forecasts and warnings at no cost.
The organisation also maintains the observation network that underpins all New Zealand forecasting — surface stations, and partnerships covering radar and satellite data — and contributes to international meteorological cooperation as New Zealand's member of the World Meteorological Organization.
Practical Tips for Getting the Most from MetService
- Check warnings, not just forecasts. A forecast might show rain, but a warning tells you when that rain becomes a hazard. If a watch or warning covers your area, read the detail rather than glancing at the map colour.
- Use radar for the short term, forecasts for the medium term. Radar answers "what happens in the next two hours"; the forecast answers "what happens this week."
- Match the forecast to the activity. Town forecasts for town plans, marine forecasts for the water, mountain forecasts for the hills.
- Enable notifications on the app. Severe thunderstorm warnings in particular can be issued close to the event, and a push notification is faster than remembering to check.
- Be wary of unofficial weather posts. Social media is full of dramatic weather screenshots and model outputs presented without context. If a claim about an incoming storm matters to your plans, verify it against MetService's official outlooks and warnings.
Why It Matters
New Zealand's weather is genuinely difficult: a long, narrow country spanning multiple climate zones, sitting in the path of the Roaring Forties, with mountains that wring moisture out of passing systems and coastlines exposed to everything from Tasman lows to remnants of tropical cyclones. A forecast that works for Auckland may be irrelevant in Dunedin on the same day.
MetService exists to make sense of that complexity. Knowing how its system works — where to find the right forecast for your situation, and what a watch versus a warning actually means — turns a weather website into a practical tool for safer, better-planned days, whatever the sky decides to do.