Rain and storms will move west to east across Spain from Wednesday, 30 September. Galicia, the Cantabrian coast and parts of the west face the longest spell of wet weather. Temperatures will rise in the southeast and northeast before falling again at the weekend. AEMET says the episode is part of a wider unsettled pattern, not a single local shower.
The front will first affect Galicia, the Cantabrian region, Castilla y León and northern Extremadura, then spread towards central and eastern parts of the Peninsula. Eastern Castilla-La Mancha and the southern Iberian System could see heavy rain, while thunderstorms and hail are also expected in some inland areas.
AEMET reported yellow and orange weather warnings across 12 autonomous communities and Ceuta, showing the unsettled episode’s broad national reach.
The front is arriving after a chain of storms and warnings in parts of Spain. Local conditions may worsen quickly where heavy rain, hail and thunderstorms develop.
On Wednesday, maximum temperatures are expected to rise by as much as five degrees compared with the start of the week across much of Spain. The northwest will be the exception, with temperatures falling there. The biggest increases are expected in the southeast and northeast, while other parts of the Peninsula will see smaller rises.
Summer-like readings will return briefly. Temperatures could again pass 30ºC in parts of Andalusia, Murcia, southern Castilla-La Mancha and southern Extremadura. Isolated readings above 30ºC are also possible in the Mediterranean area, the upper Ebro and the eastern Cantabrian region on Wednesday and Thursday.
On 29 September, Catalonia faced a particularly dangerous rainfall episode, with red warnings and forecast accumulations of up to 180 litres per square metre in three to six hours. AEMET’s warnings highlighted the risk of sudden flooding before the new Atlantic front moved farther east.
Rain will remain concentrated in the northern half of the Peninsula on Wednesday and Thursday. From Friday, showers could develop anywhere across the Peninsula and may reach the Balearic Islands. AEMET expects rain to continue through Saturday and Sunday, with locally heavy falls possible in some areas.
Official AEMET warning maps and regional emergency services will be the best guide to local conditions. Catalonia and nearby eastern areas need close attention.
Colder air at altitude will settle over the northern half of the Peninsula, while moisture arrives from the Mediterranean. Together, these factors are expected to push maximum temperatures down again in the southeast. By Saturday, the fall could reach inland and northern areas; other regions may see smaller changes.
The colder air above the surface is also likely to make the atmosphere less stable, raising the chance of thunderstorms. Many places could return to maximum temperatures near 20 degrees.
The week will split into two stages: a short warm spell in the south and east, followed by more unsettled weather and a fresh temperature drop.
A warm afternoon will not mean that summer has returned for good. Rain is set to spread from the Atlantic side and strengthen again late in the week. The national forecast could change quickly, so regional conditions matter more than the overall temperature trend.
Locally extreme downpours, hail and sudden flooding remain possible. Short-term warnings should guide decisions in Catalonia and other eastern areas.
