Jornal de Mafra published a weather forecast for September 12 to 15, 2026, covering the municipalities of Mafra, Ericeira, Sintra, Torres Vedras, Santa Cruz, and Lisbon. The forecast indicates mostly clear or partly cloudy skies during the weekend and Monday, with some clouds appearing on Tuesday.
Temperatures vary significantly depending on location. Torres Vedras and Lisbon have the highest temperatures, with maximums between 35º and 36º Celsius, while coastal locations such as Ericeira and Santa Cruz maintain milder temperatures, with maximums between 23º and 25º Celsius. Minimums range between 15º and 22º degrees.
The prevailing wind is from the north or northwest, generally light to moderate, which contributes to the dry and sunny weather characteristic of this time of year.
The Portuguese Institute for the Sea and Atmosphere issued a yellow warning for the Lisbon district due to hot weather, because of persistently high maximum temperature values. This warning is valid between 09:00 on September 12 and 18:00 on September 14, 2026, in UTC time.
