Ireland Weather Report – Tuesday 20 May 2025
Tuesday 20 May brings another chaotic twist to Ireland’s already battered May weather pattern. The day will start off deceptively dry before the skies turn ruthless. Morning calm will collapse into widespread showers—some intense enough to trigger spot flooding and lightning strikes. By afternoon, the entire island will feel the pulse of this unstable air. As evening falls, further rain will dig into the southwest. Met Éireann reports temperatures between 15°C and 20°C, but the real heat is coming from the storm energy building in the atmosphere.
Regional Weather Forecast Table
| Region | Morning Conditions | Afternoon Conditions | Evening/Night Conditions | High Temp (°C) | Low Temp (°C) | Wind |
|---|---|---|---|---|---|---|
| Dublin | Mainly dry, overcast | Scattered showers, some heavy | Showers easing late | 16 | 7 | Light southerly |
| Cork | Dry start | Intense showers, risk of flooding | Rain and drizzle developing | 18 | 9 | Variable breeze |
| Galway | Cloudy, dry patches | Showers developing | Rain clearing late | 19 | 6 | Light variable |
| Limerick | Dry, breezy | Heavy rain and thunder | Showers continue, patchy clear spells | 18 | 7 | Southerly breeze |
| Belfast | Mainly dry | Light showers spread from south | Isolated showers, clearing later | 15 | 5 | Light breeze |
| Waterford | Cloudy, dry | Showers arriving from the west | Wet evening, possible thunder | 17 | 8 | Light southerly |
| Sligo | Calm, dry | Widespread showers, chance of storms | Drying out overnight | 19 | 6 | Light breeze |
Today’s Overview
This morning may fool you. Expect many parts of Ireland to begin under grey skies with only light breezes and mild calm. But that peace ends by mid-morning in the southern half of the country. Showers will push northward fast, turning widespread by afternoon. Thunderstorms are likely, especially in inland Munster and Connacht, where humidity and heat will clash with incoming cooler air. Localised spot flooding is a real concern with high-intensity bursts of rainfall hitting saturated surfaces.
By late afternoon, the east and northeast will also begin to see heavier showers. Winds will stay light and variable throughout the day, offering no real dispersal for storm clouds. Visibility will reduce sharply during downpours, and lightning strikes may occur across open fields, hillsides, and coastal ridges.
Tonight’s Forecast
As night falls, heavier rainfall in the south will linger before gradually clearing away by early morning. Central and northern counties will see cloud breaks and even dry spells overnight, while the southwest continues to wrestle with drizzle and mist. Temperatures will dip to between 4°C and 10°C. With little breeze, some areas may develop shallow fog or lingering mist into early Wednesday.
What You Should Know
This is not your average spring shower. Today’s setup is highly unstable. Even areas that start dry are not safe from intense rain or electrical activity later in the day. Met Éireann has not issued status warnings as of early morning, but check their portal frequently as spot flooding and storm conditions escalate.
Farmers, drivers, and construction crews should operate with caution. Storm drains in urban areas may back up if rain hits fast and heavy. Pedestrians in cities should prepare for waterlogged paths and poor drainage. Power outages are not likely, but isolated flickers are possible in storm-impacted zones.
Looking Ahead
Wednesday appears to offer a brief reprieve with lower rainfall totals and longer dry spells forecasted. However, more active Atlantic systems are on the horizon for late week, meaning rain will return before the weekend. The bigger concern remains saturation—if today’s storm leaves waterlogged ground, even moderate rain later this week could result in renewed flooding alerts.
This May continues to spiral into one of Ireland’s most unpredictable spring stretches in recent memory.
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