Portugal weather in December
In December, Portugal averages 16 to 20°C by day across Madeira, the Algarve and Lisbon. Madeira is the warmest at 20°C, Lisbon the coolest at 16°C. The sea is 16 to 21°C.
Portugal in December, place by place
Warmest first. Nowhere here averages 24°C this month. Tap a place for its full December detail.
Heading to Portugal in December?
Share the places you've saved on TikTok and Instagram for Portugal to Dream Trip. It pins them on a map and builds your days around them.
Portugal in December: quick answers
Is Portugal hot in December?
In December, Portugal averages 16 to 20°C by day across Madeira, the Algarve and Lisbon. Madeira is the warmest at 20°C, Lisbon the coolest at 16°C. The sea is 16 to 21°C. December is mild in Madeira: good for exploring, not reliably beach weather.
Where is warmest in Portugal in December?
Madeira, at an average high of 20°C. The driest is Algarve, with about 69 mm of rain.
Can you swim in the sea in Portugal in December?
Yes: Madeira (21°C) has sea temperatures of 21°C or more, comfortable without a wetsuit.
How we measured this
Portugal here means Madeira, the Algarve and Lisbon: the places we measure. Figures are averages of every day from 2016 to 2025 from the Open-Meteo historical weather archive (ECMWF ERA5); sea temperatures are 2023 to 2025 averages. Rain is the average monthly total, and 150 mm or more counts as rainy season.
Planning Portugal in December?
Save the places you find on TikTok and Instagram for Portugal to one map, and Dream Trip turns them into a day-by-day plan.
