The water temperature in Portugal varies according to seasons. During the start of the kitesurfing and windsurfing season (March - May), the water temperature ranges between 15°C (59°F) to 20 °C (68°F). Throughout the summer, the water remains at a pleasant temperature, ranging between 20°C to 23°C (65°F to 70°F). Even during the winter months, if the right gear is used, kitesurfing and windsurfing can still be done, as the temperature in Portugal doesn't drop drastically. Show more