Current weather in Lisbon and forecast for today, tomorrow, and next 14 days The climate here is mild, and generally warm and temperate. Marine / ocean climate data updated daily, surface sea temperatures and recorded in degrees centigrade and farenheit. According to Köppen and Geiger, this climate is classified as Csb. The best month to swim in the sea is in September when the average sea temperature is … The sunshine levels fall dramatically during autumn in Algarve. The maximum average temperature climbs to 22ºC in October falls to 19ºC in November. Heat waves take place occasionally during which average highs above … The average annual temperature in Porto is 14.4 °C | 57.9 °F. The average temperature in the city of Porto (north of Portugal) is 20ºC / 68ºF, rising to 25ºC / 77ºF during the day. In a year, the rainfall is 1178 mm | 46.4 inch. In the month of september, the mean temperature in Porto is 74°F (maximum temperature is 79°F and minimum temperature is 68°F). The heat is more intense in the interior of Portugal, especially in the Alentejo and Algarve regions. Based on our historical data over a period of ten years, the warmest sea in this day in Algarve was recorded in 2011 and was 20.8°C/69.4°F, and the coldest was recorded in 2018 at 15.7°C/60.3°F. The Portuguese legislature has passed a law allowing employers to monitor the body temperature of employees before coming to work. In Lisbon and along the southern coast, the average temperature is around 24ºC / 75ºF but can reach 28ºC during the day. Cascais, Portugal November average sea temperature. Sagres, Portugal July average sea temperature. There is more rainfall in the winter than in the summer in Porto. However, the nighttime temperature brings cold with the average low of 13ºC. Marine / ocean climate data updated daily, surface sea temperatures and recorded in degrees centigrade and farenheit. With 1.6in over 5 days, rain may occur during your trip. The climate quite enjoyable in that area in september. Water temperature in Algarve today is 20.4°C/68.7°F. Last month the Portuguese Data Protection Authority (CNPD) issued guidelines regarding monitoring of employee health data, including body temperature. Portugal and Spain Tour packages are cost effective, pre-planned itineraries tailored to visitors wishing to see the best Portugal has to offer. Portugal tour packages optimize the cost of multiple services such as transfers, transportation, hotels, entry to events and in some cases include meals. Portugal, Portugal: Annual Weather Averages The wettest month is December with an average of 117.2mm of rain. Weather ☀ ⛅ Portugal ☀ ⛅ March ☀ ⛅ Information on temperature, sunshine hours, water temperature & rainfall in March for Portugal.