Porto weather
Our guide to the weather in Porto during December
Porto, Portugal is a vibrant coastal city with a rich cultural heritage and plenty of activities to enjoy year-round, especially during the milder winter months. We've looked at the most up-to-date weather data for Porto, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Porto weather in December.
What's the temperature like in Porto during December?
The temperature reaches around 15℃ during the daytime in December, falling away to 10℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Porto during December?
December is typically the wettest month in Porto. On average, there will be 9 rainy days during the month, amounting to 266.6mm in total. That's a lot of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Porto during December?
You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during December. With moderate air temperatures, any breeze will feel cool.
Is it too cold to swim in the sea in Porto during December?
The water around Porto is a bracing 14℃ during December and would be considered too cold for swimming. Those who are a bit more hardy or frequently swim in cooler open water might want to take a quick dip. A wetsuit would be advisable if you wish to spend longer than 5 minutes in the water.
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