Mainland Portugal, The climate in Portugal varies considerably from one region to another and is influenced by the relief, latitude and proximity to the sea, which offers mild winters, especially in the Algarve.
In the Porto e Norte area and Beiras region, particularly inland, nearer Spain, the winters are colder, although the temperatures are still mild when compared to the rest of Europe. There is some snowfall. It occurs most in the Serra da Estrela mountains, where we find the highest point in mainland Portugal (1,991 m) and where it is sometimes possible to ski.
The summers are hot and dry, especially in the inland areas (Trás-os-Montes in north-eastern Portugal and Alentejo). Temperatures are slightly lower in the coastal areas, because of the influence of the sea.
There are often warm, sunny days in autumn. Nice weather at the beginning of November is often called "St. Martin’s Summer" as this saint’s day is on 11 November.