The climate is Mediterranean, but with strong maritime influence. Temperatures remain mild throughout the year except during periods of rising winds, where they can go up or down dramatically.
The wind regime is an important factor in climate. The prevailing winds are from the north quadrant. Sometimes occur southwesterly winds, especially in winter, while the uprising occur with low incidence throughout the year. On summer afternoons are common and intense moisture laden sea breezes.
Temperatures increase from north to south; annual averages of 16/17 ° C in Old and Sines Monte and 17/18 ° C in Vila do Bispo and Sagres, in the summer (June-September) the monthly averages are around 20-23º and winter (December to February) 11/13 with annual peaks can vary between -4 ° (inside in January) and 40 in July.
The area of Sagres headland has the lowest temperature range of Portugal.
The maximum rainfall occurs in December, with the annual average between 400 mm in the Sagres area and 600/800 mm in the interior hills and the remaining coast north of Odeceixe. In general, it rains further north and into (mountain area), the rainy season sets is between November and April.
Precipitation shows a typical torrential nature of south of the country and the other Mediterranean areas.
The fogs are not very common, occurring in just a few days of the year, but the humidity tends to remain high, even in warmer periods.
The average annual insolation is very high, the highest in the country and in Europe.
The sea presents generally rougher than the Algarve, but calmer than the north coast of Cabo Raso, waving predominant NW / WNW 2 m.
When strong pressure systems approach shore or directly affect, in the winter time, there may be temporal W / SW with curling up to 10 m.
The sea water is very rich in biodiversity but also fresh and pure, given the frequent upwelling, with temperature ranging between 14/15 in February and 20/21 in September.