Irish Summer Heats Up: What's Behind the Warm Spell?

Ireland is experiencing a period of notably warm weather for late June and early July, with temperatures in some areas, particularly the east, potentially reaching up to 26°C. While this isn't a full-blown heatwave across the entire island by Met Éireann's definition (5 consecutive days over 25°C), it's certainly a departure from the typical Irish summer, leaving many wondering what's causing the mercury to rise.

According to Met Éireann and other meteorological experts, the current warmer conditions are largely influenced by a "heat dome" affecting much of Europe. This phenomenon involves a high-pressure system that traps hot air beneath it, leading to prolonged periods of warm, settled weather. While countries like Spain, Portugal, and France are currently enduring a severe heat blast with temperatures well over 40°C, Ireland is catching the edge of this system.

Another significant contributing factor is the elevated sea surface temperatures in regions like the Mediterranean Sea and the Bay of Biscay. Experts at Metwatch have noted these temperatures are 3-6°C higher than average for this time of year. While not directly over Ireland, these warmer waters can influence atmospheric patterns and contribute to more intense and uncomfortable heatwave conditions in general, indirectly affecting our weather too.

It's also worth noting that when Ireland experiences higher temperatures, they can often feel hotter than similar temperatures in other countries due to the higher humidity. Our buildings and infrastructure are generally not as equipped for prolonged heat, and the lack of "tropical nights" (where temperatures don't drop below 20°C) means less respite from the warmth.

While the forecast for the immediate days ahead suggests some cloud, mist, and drizzle, especially in the west and north, parts of the country, particularly the midlands and east, are expected to continue seeing highs in the low to mid-20s. This pattern highlights the influence of these large-scale atmospheric events on Ireland's usually temperate climate.