Forecast for Saturday
Barcelona will see a maximum temperature of 33 degrees and a minimum of 26 degrees on Saturday, August 15, according to the State Meteorological Agency (AEMET). The day will start with clear skies, but high clouds will appear in the afternoon, and there is a low risk of isolated showers in the evening. Humidity will be high, making the heat feel more intense, with a thermal sensation reaching up to 39 degrees.[S2][S4]
Other forecasts indicate a maximum of 30 degrees and a minimum of 25 degrees, with winds of 10 km/h and average humidity of 70%. The UV index is expected to be 8, and the probability of precipitation is only 1%, with cloudiness at 45% during the day and night. Wind gusts will reach 14.8 km/h during the day and 9.3 km/h at night.[S1][S3]
Heat Alert and Rain Prospects
The Meteorological Service of Catalonia (Meteocat) has issued an orange alert for extreme heat on Friday, August 14, affecting parts of the region, with the highest risk between noon and 6 PM. However, the forecast for Barcelona changes from Saturday, with possible rain starting that day and a high probability of over 75% from Sunday, August 16, lasting until Wednesday, August 19.[S5]
The AEMET also predicts intervals of clouds with strong showers and storms in the interior of the province, possibly reaching the coast. Temperatures will drop, especially on the coast, with light winds from the southeast. In L'Hospitalet de Llobregat, there is a 40% chance of rain, with wind gusts up to 40 km/h and humidity up to 85%.[S4]
Transport and Traffic
Public transport in Barcelona operates normally as of 9 AM on Saturday, but there are summer works affecting metro and tram lines. The metro L9 Nord and L10 Nord have suspended service between La Sagrera and Onze de Setembre until August 30. The L1 line is interrupted between La Florida and Plaça de Sants until August 28.[S2]
The TRAM tram service is also affected on lines T4, T5, and T6, with disruptions until September 15, and a replacement bus service has been arranged. The Catalan Traffic Service (SCT) reports no major traffic incidents on the roads as of 9 AM Saturday.[S2]
Climate Context
Barcelona is located in the northeast of Spain on the Mediterranean coast, where two main climate types dominate: continental Mediterranean and humid subtropical. The continental Mediterranean climate, typical of the south, has mild winters and dry, hot summers, with rain mainly in winter or intermediate seasons. The humid subtropical climate, in the north, has cold or mild winters and humid, warm summers, with rainfall distributed throughout the year.[S1]
According to AEMET, the maximum temperature in Barcelona is around 30 degrees in July and August, while minimums drop below zero between December and January. The rainiest months are September and October, and snowy days are rare, averaging fewer than 10 per year. Spain generally enjoys about 3,000 hours of sunshine annually, with the most pleasant weather in spring and autumn.[S1]
