Secrets of the deep: How many sharks are swimming in our waters?
The global shark and ray population has declined by a worrying amount.
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Latest fromNiwa
Rare weather: Three tropical cyclones tracking north of NZ
Doesn't happen often, but minimal risk to New Zealand for now.
NZ's weird summer: Drought in the north, drenched in the south
January's feast-or-famine rainfall leaves south saturated and far north in severe drought.
The best and the worst: Who's had the most sunshine so far this year?
Good day sunshine? Some towns and cities have enjoyed 50 per cent more sun than others.
Explained: The weird La Nina flavouring your summer
NZ's north should be wetter right now, and the south drier. Blame it on a strange La Nina.
Summer outlook: Unusually hot weather in store, as north dries out again
NZ can expect above-average temperatures for the rest of summer, as north dries out again.
Danger looms as NZ beaches heat up again - and may keep warming
After cooler December, NZ coastal waters are heating up again. Will they keep warming?
Thunderstorm threat looms for Nth Island as holidaymakers start long crawl home
It is a mixed bag on the weather front today.
New Zealand scientists to study sperm whales in Antarctic voyage
NIWA will embark on its third voyage studying the elusive creature.
Severe thunderstorms dump hail and cause flash flooding
A severe thunderstorm warning has now been issued for Gisborne and Wairoa.
Your Christmas Day weather: The best spots to be
Some Kiwis will be hitting the beach, while some might even have to get the fire going.
30C scorcher: NZ set to swelter in the sun; forecasters also on cyclone watch
Some spots could hit 30C this week, with warm, sunny weather in store for most regions.
The southerly switch: Muggy nights move out for cool change
The southerly change will likely bring frosts, or snow, to some areas of the South Island.
Heatwave bypasses windy Wellington this week
The country's heatwave will not be making a stop in the capital this week.
Incredible rare cloud formation spotted over Auckland skies
The official name for the clouds is Kelvin-Helmholtz.
It's the first day of summer! What weather lies ahead?
December 1 is officially the first day of summer.
Summer forecast in the capital 'welcome news for the average Wellingtonian'
Six minutes shy of the gloomiest November, summer promises warmth for Wellingtonians.
Even after deluges, remnants of Auckland's big dry remain
Hold-out pockets of drought spread around Auckland linger after biggest dry in 25 years.
New analysis reveals NZ's 150-year climate transformation
All of NZ's coldest years happened before 1933 - and its warmest have come since 1998.
Dry summer on the cards for parts of Canterbury
Christchurch has had over 150mm less rainfall than the yearly average.
Another marine heatwave forecast
A marine heatwave this summer would be the third in four years.
Anatomy of a deluge: What caused Napier's big downpour?
Napier deluge came with unfortunate atmospheric collision and a climate change tail-wind.
Drought fears as Bay of Plenty 'severely dry' ahead of summer
Niwa's 60-day index has deemed the Rotorua area and coastal Bay of Plenty "severely dry".
Heavy rain lashes Auckland, strong winds may close harbour bridge
Heavy rain and strong winds have been thrashing the North Island today.
Auckland is in for a hellishy humid summer - here's why
La Nina means sticky humidity for Auckland this summer. But what does climate change add?
Hot zone: Canterbury temperatures to skyrocket over long weekend
Temperatures could climb to 27 degrees by Sunday.
Drought fears for South Canterbury farmers
NIWA's latest hotspot report showed the driest soils in the South Island.
Largest Antarctic ozone hole in years: What will it mean for NZ?
The ozone hole over Antarctica is at its widest and deepest in years. Will that affect us?
Aucklanders: Enjoy a calm October before wet, hot summer arrives
After a messy September, most Kiwis can look forward to a warmer and calmer October.
From winter snow to scorching sun - Aussie air sees temperatures soar to 26C
It's been a wild, wintry week but sunny skies and hot temperatures are coming our way.
Warm and wild: Three ways La Niña will mess with our summer
The north could be in for a wet summer - and the south a dry one - as La Niña forms up.
$160m a year: Sweeping new assessment of NZ's big flood threat
Scientists have just launched NZ's first-ever national assessment of flood risk.
Why NZ could be in for another unusually hot summer
A climate scientist has called a La Niña summer for NZ - and a likely 'marine heatwave'.
Winter 2020: NZ's warmest on record
'By 2040, we might be looking back at this as a normal winter.'