Broualan is a small village in the Ille-et-Vilaine department of Brittany, usually known for its fresh Atlantic sea breezes. Even on warm spring days, its proximity to the ocean often brings comfortable temperatures. However, at the end of May 2026, the weather in Brittany was completely different.
“I was terribly hot that night, with temperatures reaching 28 degrees Celsius,” said a resident. This sentence sounds like a memory from a Mediterranean vacation day at first. In fact, it comes from a region many associate more with trench coats than tropical nights.
The nighttime temperatures in particular have recently drawn attention.
While the daytime temperature rise is impressive, meteorologists believe the unusually warm nights are especially noteworthy. The reason is obvious: after sunset, temperatures hardly drop, making it difficult for the body to cool down as needed. Sleep becomes difficult, houses retain heat, and elderly or health-compromised people face greater stress.
In Broualan and other places in Brittany, the recent nighttime lows rival those of midsummer. Nearby Dinard recorded nighttime lows above 22 degrees Celsius, significantly breaking previous May records. Many residents felt that night was more like late July than the end of May.
This abnormal heat is not unique to Brittany. Multiple regions in France broke local temperature records within just a few days. Meteorologists call this an unusually early and sustained heat event. The occurrence of such high nighttime temperatures in May underlines the uniqueness of the current weather conditions.
People who have lived in Broualan for decades are experiencing significant climate changes. Past mild summer nights were comfortable and rarely oppressive. Now, residents report that even after midnight, bedroom temperatures hardly drop. The heat lies over houses like a heavy blanket.
These are still isolated record events for now, but they already show that extreme weather phenomena are increasingly impacting areas once considered relatively cool and temperate. Brittany — once synonymous with fresh sea breezes — now experiences nights more reminiscent of southern coasts.
Author: C.H.