Portugal mild Atlantic. South (Algarve) warm, north (Porto) cooler, Madeira/Azores year-round.
April-June — best time
Lisbon 15-25°C. Algarve 20-27°C, water 17-20°C. Prices 30-40% lower.
July-August — peak
Algarve 27-32°C packed. Prices double.
September-October — second best. Water warm October.
November-March — winter
Lisbon 8-15°C.
Madeira 15-20°C YEAR ROUND („European Hawaii").
No visa EU/most.