Temperatures across Ireland soared this week, reaching 30 °C on Valentia Island in County Kerry [1].
The sudden spike in temperature is significant because May typically sees much cooler weather in the region. Residents and visitors across the country have flocked to outdoor spaces to take advantage of the unexpected sunshine.
The heat is the result of a warm air mass moving into the region. Some reports described the phenomenon as a "Spanish plume" or a "heat dome" that pushed temperatures into the high 20s and 30s [1, 2, 3]. While early forecasts suggested temperatures could soar to 27 °C as the air mass approached [2], actual readings exceeded those predictions.
Observations varied slightly across the country. While Valentia Island recorded 30 °C [1], other reports indicated that temperatures reached as high as 31 °C in some parts of Ireland [3]. These figures represent a sharp departure from the seasonal norm for the month of May.
Met Éireann said the heat will soon ease. Despite the coming cooldown, the public continued to gather in parks, and coastal areas to enjoy the rare warmth.
The event follows a pattern of volatile spring weather. The movement of warm air from southern Europe, the Spanish plume, often brings rapid temperature increases to the British Isles, though reaching 30 °C in May remains an uncommon occurrence.
“Temperatures across Ireland soared this week, reaching 30 °C on Valentia Island”
The occurrence of 30 °C temperatures in May suggests a significant deviation from historical weather patterns in Ireland. When combined with the presence of a 'heat dome' or 'Spanish plume,' such events illustrate how atmospheric blocking can trap warm air over Northern Europe, leading to short-term but intense heatwaves well before the traditional summer season.
