The last spell of late-summer heat in southern Italy is giving way to more unsettled weather, with Campania expected to see the change arrive from Friday, 18 September 2026.
Local reporting describes it as the end of the hot phase in the South, with a front moving toward Campania on Friday. A separate local forecast for the region points to rain, showers and thunderstorms on Thursday 17 and Friday 18 September, followed by lower temperatures.
What is expected, day by day
In Naples, showers are possible late on Thursday, with thunderstorms possible during the night between Thursday and Friday.
For Salerno, Caserta, Avellino and Benevento, conditions are expected to worsen mainly on Friday. The forecast describes rain, showers and thunderstorms alternating with clear spells, rather than continuous bad weather.
Saturday may remain unstable in parts of Campania. Improvement is expected on Sunday, 20 September.
Temperatures fall from Friday
Maximum temperatures are expected to fall from Friday across the region's provincial capitals, generally reaching about 23-25°C.
That marks a clear break from the recent heat in the South, even if brief bright intervals remain possible between showers.
What remains uncertain
No official Campania Civil Protection weather alert was identified in the available research for this event. Thunderstorm intensity, local effects and precise timing may still change as the front approaches, and the primary Metropolis Web report was only partially available for detailed comparison.
Readers in Naples and across Campania should follow updated local forecasts through Thursday evening and Friday, especially if travelling between provinces on Friday when the deterioration is expected to be most widespread.
