Switzerland has barely recovered from its record-breaking June heatwave when forecasters say another bout of intense heat and the possibility of another heatwave is already building. Temperatures north of the Alps could climb to 35 degrees again next week, raising the question of whether the country faces a third major heatwave in a single month.
“Average maximum temperatures over the next two weeks are expected to be at or near record levels,” states MeteoSwiss.
The current heatwave has already been one of the most persistent on record.
According to MeteoSchweiz, the first heat day, with temperatures at or above 30 degrees, occurred in Swiss lowlands on 17 June, and the consecutive run of heat days has remained unbroken since, lasting at least 13 days and expected to continue until at least Monday, 29 June 2026.
The 14-day average of maximum temperatures will sit well above 30 degrees, MeteoSchweiz said, a threshold that underlines the unusual intensity of the episode.
June 2026: A Month of Records
The June heatwave peaked at 33 to 37 degrees in parts of Switzerland, with the Basel region and the northwest recording the highest levels. MeteoSchweiz raised its heat warning to level 4, the second-highest, for parts of the Mittelland stretching from Central Switzerland to the Jura foothills and High Rhine, while most of the rest of the country operated under a level 3 alert.
June temperature records fell at several measuring stations, particularly in northwestern and western Switzerland, according to MeteoSchweiz. The agency said the heat warning for the entire north side of the Alps has been extended until Monday evening, with widespread thunderstorms expected to bring relief as a cooler, more humid westerly flow arrives.meteoschweiz.
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Another Heatwave Already Forming
Even as warnings from the current heatwave remain in force, meteorologists are already tracking a fresh warming pattern for next week. MeteoSchweiz meteorologist Denise Praloran confirmed to nau.ch that next week “looks very warm,” with probabilities of temperatures between 30 and 35 degrees on the north side of the Alps being “relatively high.” Whether it technically qualifies as a new heatwave is not yet certain, she said, but the possibility cannot be ruled out.
One mitigating factor: from Wednesday 1 July onwards, significantly drier air is expected to arrive from the north, which should allow for better overnight cooling and reduce the heat burden compared to the current episode. For that reason, MeteoSchweiz said a formal heat warning is not currently required for next week.
The back-to-back heat pattern fits a broader trend of increasingly hot Swiss summers. The country is also dealing with ongoing drought conditions, with the drought danger level at moderate to elevated across much of the country. Authorities continue to urge the usual precautions: stay hydrated, avoid the midday sun, check on elderly or vulnerable neighbours, and follow cantonal health guidance.
