Ireland
Narrative updated. “Met Éireann is watching for intense rain and storms as a powerful El Niño builds”
Ireland has just come through a markedly warm and dry late-summer window, with mean temperatures 1.6°C above normal and rainfall 34% below the 1991–2020 average for 9 July to 6 October — though that period is the climatological dry season, so the percentage understates how little rain normally falls. Met Éireann has warned that this strong El Niño could bring more intense rain and storm activity to Ireland as the autumn and winter wet season arrives, a signal that matters far more than the summer deficit. Commentators have described the event as a 'Super-Duper El Niño', and while the canonical Irish El Niño signal is weak, the combination of exceptional ocean warmth and a wet-season storm track keeps flood and wind risk on the agenda.
172.9 mm vs 261.3 mm normal
Measured rainfall for 9 July–6 October 2026 ran 34% below the 1991–2020 normal, though this window is Ireland's climatological dry season (normally under 20 mm), so the more meaningful signal is Met Éireann's expectation that El Niño will steer the coming autumn and winter rains toward more intense, storm-driven downpours.
News source15.61°C mean vs 14.03°C normal
Mean temperatures over the same window came in 1.6°C above normal, consistent with the strong El Niño background and with commentary that this event is unusually powerful.
News sourceThe May–September growing season appears to have run broadly on schedule, with the warm, dry late-summer window favouring ripening and harvest progress rather than causing a documented delay.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (53.0°, -8.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for Ireland and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
A warm, dry late summer has helped ripening and harvest progress, but farmers should prepare for waterlogged fields and grazing disruption if the forecast intense autumn rain arrives.
Reservoirs and rivers are likely to recover quickly from the summer dry spell, with the greater risk shifting toward flash flooding and high river levels rather than shortage.
Above-normal temperatures raise heat-stress and air-quality concerns in summer, while wetter, stormier conditions increase flood-related injury and waterborne disease risk.
Storm-driven wind is expected to boost wind-power output but also raises the risk of network damage and outages during intense winter events.
Stronger autumn and winter storms could restrict fishing days and damage inshore gear, while warmer coastal waters may shift mackerel and other migratory stocks.
What happened last time
Past El Niño episodes and how Ireland responded. See the full ENSO timeline →
2023-24
A strong El Niño contributed to a very wet Irish autumn and winter, with saturated soils and significant flooding in several river catchments.
unsourced background2015-16
One of the strongest El Niño events on record was followed by a mild, stormy Irish winter, including named storms that caused widespread power outages and coastal flooding.
unsourced background1997-98
A very strong El Niño coincided with a notably mild, wet Irish winter, with repeated Atlantic storm systems and localised flooding.
unsourced backgroundLatest coverage
RSSPrepare for imminent return of El Niño, UN warns
Warm, dry summer gives way to storm risk as 'Super-Duper El Niño' looms over Ireland
Ireland has just come through a markedly warm and dry late-summer window, with mean temperatures 1.6°C above normal and rainfall 34% below the 1991–2020 average for 9 July to 6 October — though that p
What is El Niño, and how does it affect the weather and temperatures?
What Could El Niño Mean for Ireland?
El Niño could bring 'intense' rain, storms - Met Éireann
Nearby
Neighbouring countries