100 Degree Weather: What to Wear in Ireland When It Gets Hot

When the temperature hits 100 degree weather, an extreme heat event rarely seen in Ireland’s typically cool climate. Also known as heatwave conditions, it’s not just a weather anomaly—it’s a wardrobe crisis. Most people in Ireland have never needed to plan for this. But when it happens—like in the summer of 2022, when Dublin hit 32°C (90°F) and parts of the south crept close to 38°C (100°F)—suddenly, everyone’s asking: what do you actually wear?

The truth is, Irish summers aren’t built for heat. Our closets are stocked for rain, wind, and damp chill. But when the sun stays out for days, you need more than a thin cotton top. You need breathable fabrics that don’t stick, shoes that don’t trap sweat, and layers you can shed fast. Irish summer fashion, the practical, low-key style locals rely on when the weather turns warm. Also known as weather-ready summer wear, it’s not about beachwear—it’s about surviving a heatwave in a country that never trained for one. Think lightweight linen shirts, loose shorts that don’t ride up, and sandals with grip—not flip-flops that slide off wet pavement. You’ll see people in summer footwear Ireland, practical shoes designed for warm days and unpredictable rain. Also known as heatwave-ready sandals, they’re often the same ones worn to the garden centre, the beach, or the pub after work—because in Ireland, even heatwaves don’t cancel the daily grind.

And it’s not just about clothes. It’s about what you avoid. No heavy wool coats. No thick denim that traps heat. No leather boots that turn your feet into steam rooms. Instead, you reach for breathable cotton, open-weave knits, and moisture-wicking blends—things you’d normally save for a holiday abroad. You carry a small towel. You keep a bottle of water in your bag. You check the forecast not just for rain, but for UV levels and humidity. This isn’t vacation style. This is adaptation.

When 100-degree weather rolls in, you don’t need a new wardrobe—you need smarter choices. The posts below show exactly what Irish people are wearing when the sun beats down, from the best summer slippers to the t-shirts that actually last through sweat and washes. You’ll find out why Hawaii slippers are everywhere, why Crocs show up in workplaces, and how even the most basic t-shirt can make or break your day. No fluff. No trends. Just real, tested, weather-tested answers for when Ireland turns hot.