You can jump to a separate table for each part of the country: Southern, Lisbon Region, Central and Northern Portugal. The weather is better from the previous month since in february it receives an average of 5.9in of rainfall over 12 days. The climate is relatively cool here this month, but it is bearable by dressing hot. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F). For most, swimming in 15.1°C (59.2°F) is not an enjoyable activity. During March, the Meditteranean climate heats up as spring breaks through. Average temperatures for March at cities throughout Portugal are listed below in degrees Celsius and Fahrenheit. The maximum temperature averages out at a pleasant 19°C, while the temperature falls, on average to around 10.5°C at night. Water temperature Madeira: 7 days forecast 12 May 13 May 13 May 14 May 14 May 15 May 16 May 17 May 18 May. There are usually 13 days with some rain in Lisbon, Portugal in March … The average sea temperature around Lisbon, Portugal in March is 15°C. As for the weather, temperatures will hover around a temperate 53 degrees Fahrenheit (12 degrees Celsius), so bring a light jacket. Does it rain in Portugal in March? Madeira: The current water temperature 20 °C. The … The climate in march in Porto is rather dry (with 5.2in of rainfall over 11 days). In Lisbon, Portugal, in March, the average water temperature is 15.1°C (59.2°F). The average low temperature is 40 degrees F (4 degrees C). The average high temperature is 58 degrees F (14 degrees C). Date. Water temperature Porto: 7 days forecast. Does It Rain In The Algarve In March? The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1971 to 2000. The temperature is suitable for swimming.