average temperature algarve portugal
1 The average temperature in Algarve, Portugal is 17.8 Â°C (64 Â°F). 2  The range of average monthly temperatures is 12 Â°C. 3  The warmest average max/ high temperature is 28 Â°C (82 Â°F) in July & August. Imperial graph. 2  Imperial table. 3  Altitude; 7 m (23 ft). 4  The average temperature in Algarve, Portugal is 17.8 Â°C (64 Â°F). 5  The range of average monthly temperatures is 12 Â°C. 6  The warmest average max/ high temperature is 28 Â°C (82 Â°F) in July & August.