The summer solstice starts at 10:14 today (Lisbon time), according to the Lisbon Astronomical Observatory.
IPMA forecasts for the first day of summer are for periods of very cloudy skies, showers in the North and Centre and Alto Alentejo regions and light to moderate wind from the west.
The minimum temperatures on the mainland will fluctuate between 7 degrees Celsius (in Guarda) and 14 (in Aveiro and Faro) and the maximum between 16 (in Guarda) and 25 degrees (in Faro).
Summer will end on September 23, with the arrival of autumn at 2:04 am.