New Zealand
Narrative updated. “Record El Niño, a 27% rainfall deficit and Fonterra already flagging milk-supply risk — what it means for NZ”
A record-strength El Niño has arrived, and New Zealand is already seeing its signature split: rainfall 27% below normal for July–October 2026 while temperatures sit 0.5°C above average. Fonterra and dairy analysts warn the drier eastern pasture belt could squeeze milk supply and farm profits as the event peaks over December–February. The coming spring rains will decide how hard the agricultural sector is hit.
184 mm vs 253.1 mm normal
Reanalysis shows rainfall 27% below the 1991–2020 normal for 9 July–6 October 2026, consistent with the dry-eastern pattern the articles attribute to a strong El Niño.
News source10.84°C mean vs 10.33°C normal
Mean temperatures for the same window ran 0.5°C above normal, a milder signal than the cooler-than-average conditions some El Niño commentary implies.
News sourcePasture growth through September–November is expected to track near normal overall, but eastern and drought-prone dairy regions face a drier-than-normal spring that could trim milk supply into the December–February peak.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (-41.0°, 174.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for New Zealand and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
Dairy and dryland pastoral farms in eastern regions face reduced pasture growth and higher supplementary feed costs as El Niño peaks over summer.
Below-normal rainfall is expected to lower river flows and soil moisture in eastern catchments, increasing irrigation demand and pressure on storage.
Hotter, drier summer conditions raise heat-stress and dehydration risk, with potential water-quality issues in low-flow catchments.
Drier conditions reduce hydro-lake inflows in the South Island, raising reliance on thermal and wind generation over the summer peak.
Warmer coastal waters and shifted currents may push some inshore species southward, altering catch composition for commercial and recreational fishers.
What happened last time
Past El Niño episodes and how New Zealand responded. See the full ENSO timeline →
2023-24
El Niño conditions brought a dry summer to eastern regions, with dairy processors flagging milk-supply volatility similar to current warnings.
unsourced background2015-16
Strong El Niño contributed to drought in parts of the South Island and lower North Island, reducing pasture growth and farm incomes.
unsourced background1997-98
One of the strongest El Niño events on record brought severe drought to eastern New Zealand, cutting dairy and sheep-beef production and prompting widespread irrigation restrictions.
unsourced backgroundLatest coverage
RSSFormidable El Niño expected to arrive this winter
Top dairy exporter Fonterra flags El Niño risks to milk supply
New Zealand Dairy Farmers Face Profit Squeeze as El Niño Looms
Australia and New Zealand Winter Outlook
Record El Niño Tightens Its Grip: Dry East, Milk-Supply Risk for New Zealand
A record-strength El Niño has arrived, and New Zealand is already seeing its signature split: rainfall 27% below normal for July–October 2026 while temperatures sit 0.5°C above average. Fonterra and d
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Other countries in Australia and New Zealand