In May 2026, Ireland experienced its hottest May on record, with temperatures reaching 30.5°C at Shannon Airport on 26 May — the highest May temperature ever recorded in over 120 years of measurements. The warm air mass — a “heat dome” originating from North Africa — brought summer conditions two months early. If you are planning a trip to Ireland this summer, the beaches and wild swimming spots that came alive during that record heatwave are at their very best right now.
The Counties With Ireland’s Finest Wild Swimming Spots
At the height of the heatwave, Met Éireann’s Status Yellow warning covered Clare, Kerry, Limerick, Tipperary, Galway, Kilkenny, Laois and Offaly, with temperatures between 22°C and 30°C — hottest inland and in the west. These are the same counties home to some of Ireland’s finest natural swimming spots, and they remain exceptional for summer swimming.
The Best Places to Swim in Ireland This Summer
County Clare and the Burren Coast
Fanore Beach sits between the limestone landscape of the Burren and the Atlantic. It holds a Blue Flag designation, and on a warm day the shallow waters are among the most beautiful swimming spots in Ireland. Kilkee on Loop Head Peninsula — carved by the Atlantic into a natural amphitheatre — has sheltered, crystal-clear water in its cove and is among the warmest coastal spots in the west.
County Kerry: Ireland’s Blue Flag Capital
Kerry has more Blue Flag beaches than any other county in Ireland. Inch Beach on the Dingle Peninsula stretches for nearly 3 miles and faces Dingle Bay. In warm weather, the dunes behind Inch provide natural shelter. Derrynane in South Kerry — sheltered by headlands, shallow, sandy — is regarded by many as Ireland’s finest swimming beach and is particularly magical during a sunny spell.
Lough Derg, Tipperary and Clare
One of the largest lakes on the River Shannon system, Lough Derg runs along the borders of Tipperary, Clare and Galway. Wild swimming spots along its shore have been used by local families for generations. Lough water warms faster than coastal waters during a heat spell — expect temperatures several degrees warmer than any Atlantic beach on the warmest summer days.
Connemara and Galway’s Wild Atlantic Way
Dog’s Bay in Connemara — 1.6 kilometres of powder-white shell sand — and Salthill’s promenade swimming spots are exceptional during warm weather. The iconic diving boards at Salthill’s Blackrock have drawn swimmers to this spot since 1885. Water temperature along Galway Bay in summer sits around 13–15°C: cool enough to be refreshing, wild enough to feel like Ireland.
Ireland’s Record May Heatwave: How Hot Did It Get?
The May 2026 heatwave was driven by a “heat dome” — a high-pressure system trapping warm North African air over western Europe. On 25 May, Shannon Airport in County Clare broke the national May temperature record with 28.6°C. The record didn’t last 24 hours: the following day, Shannon reached 30.5°C — the highest May temperature ever recorded in Ireland in over 120 years of measurements.
Frequently Asked Questions
What caused Ireland’s record heatwave in May 2026?
A “heat dome” — a high-pressure system trapping warm North African air over western Europe — brought temperatures 8–10°C above the seasonal average to Ireland. Shannon Airport recorded 30.5°C on 26 May 2026, the highest May temperature in Irish recorded history.
Is it safe to swim in Ireland during a heatwave?
Yes, with care. Water safety groups advise never swimming alone, checking currents at unfamiliar beaches, and being mindful that cold water shock can occur even in warm weather. Swim at lifeguarded beaches wherever possible and check Irish Water Safety for current conditions.
Which counties have the best swimming in Ireland?
Clare, Kerry, and Galway have Ireland’s finest beaches and greatest concentration of Blue Flag swimming spots. The Dingle Peninsula, Connemara, and the Burren coastline all offer exceptional swimming conditions in summer.
☘ Never Miss an Ireland Story
Join 64,000 readers who discover Ireland every weekday — free.
Tours & experiences you might love
Powered by Viator. Some links are affiliate links — we may earn a small commission at no extra cost to you.
Secure Your Dream Irish Experience Before It’s Gone!
Planning a trip to Ireland? Don’t let sold-out tours or packed attractions spoil your journey. Iconic experiences like visiting the Cliffs of Moher, exploring the Rock of Cashel, or enjoying a guided walk through Ireland’s ancient past often sell out quickly—especially during peak travel seasons.
Booking in advance guarantees your place and ensures you can fully immerse yourself in the rich culture and breathtaking scenery without stress or disappointment. You’ll also free up time to explore Ireland’s hidden gems and savour those authentic moments that make your trip truly special.
Make the most of your journey—start planning today and secure those must-do experiences before they’re gone!